Please? Pretty Please!?
Judging from similar threads, this is the most unpopular opinion around here. Still, I have to back this one up. Hell, make it cost a Tainted Brain + Blood of C’thon + Ancient Heart + lots of iron. Make it hard to farm for and achieve; but possible. And do not allow to respec the class itself; the last mastery skill should not be refundable.
Why support this? My argument is twofold, and comes from intrinsic design choices of the game itself:
1 - Exploration
2 - Character Development
1 - I’m learning the game and the classes, and I want to try out the highest tier skills in the skill tree, at least once, to see if they are powerful / fun to play.
2 - After trying out all skills and reaching a mid level (50-ish) I will start to design my own build with only a few skills maxed; and most likely one of the masteries needs only 40 points, and not 50.
Result: I’ve lost 10 skill points (or more), and for that I have to remake the entire character…?
That does not make sense.
Yes, yes, I’ve read it a thousand times: replayability is a thing in the game! But that’s fun ONLY IF you’re trying a new class / build. It’s NOT FUN to replay exactly the same build again. Especially if the goal is to fine-tune a few mastery or attribute points.
<Insert unpopular opinion meme here> :undecided:
If you can’t change the class what’s the point in buying back the mastery points? 
And you’re not playing the same build, you said yourself you’ll be changing skills around so the build will be different. You can buy back skill points so no problem there.
Well, the answer to your question is, as I said before:
In other words; you end up with 10 more points in the mastery than you need. That’s 10 skill points that you cannot use in your main skills, which is a pretty big deal; it’s like an entire skill that you could max out, but you can’t.
Minor changes such as fine-tunning the distribution of skill points = the same build, not a different one. People fine-tune their skills to perfection all the time that’s why there is skill respec NPC in the first place… so yeah no problem there.
Which is why you play around with grimcalc.com first. Or make another toon using the same masteries.
It isn’t going to change so there’s no point in repeating the same request over and over. The devs have had 4 years to change it if they wanted to, it’s obvious they’re happy with the game as is. You’ll simply have to wait for Soulseekkor to get his GD Defiler program fully done as that will probably have a function for undoing masteries same as TQ Defiler does.
Grim Dawn’s quite open to replaying. Replay it. Make more characters.
If tomorrow you started Grim Dawn and one of your level 85 characters disappeared due to some corrupt file, would you feel much happiness in knowing that you had to replay that same character from zero?
Maybe, you would feel that you lost a ton of effort invested in a character that you carefully developed, which is now gone.
It’s been said before; don’t tell people to replay exactly the same thing. Replaying with other chars / classes? Sure. But that’s off-topic.
BTW, refer to my first post.
So a new player that never ever tried GD should go to grimcalc first…? That doesn’t make sense. Sure grimcalc helps after you’ve got some experience, but only in-game can you get a feel of how the skills play out / how fun they are / what build you want to go for.
What had been discussed before was different: the request to change an entire class for another one. That, I agree, is a bit extreme.
Anyway, although in my opinion the mastery-point-respec feature should belong to the game, I already knew that this is not the general opinion of the community, so yeah, you’re right, I’ll just wait for some mod / editor…
why wait, GD Stash can do that today 
I wasn’t aware of that, I only knew that GD Defiler was under development.
Thank you.
Didn’t realise the GDStash had it mamba, thanks.
As a new player you have to expect to lose/change toons as a matter of learning about any RPG. I gave up on a lot of toons when I was first learning to play Titan Quest Immortal Throne because my builds were bad. I’d only played Oblivion and Morrowind a little bit and hadn’t liked them so I didn’t have a lot of experience of RPG’s at all. But I learned, thanks to the help and advice I got at the forum at titanquest.net and it’s the same here. If I can’t work something out I ask and someone here is bound to know the answer to point me in the right direction. Both forums are great places to find out how to play the games. 
And no I wouldn’t be happy to lose a L85 toon or any other due to corrupted files or crashing PCs, but I’d probably swear a bit and then start over. In fact I had that happen to me recently when playing TQIT. Lost 4 toons and I’ve had to start them over. No, it’s not fun, but I enjoy both TQIT and GD too much to let the lose of a toon put me off playing them.
It is a relatively recent addition. Once I started reading and writing char files to access their items, some rudimentary char editing came for almost free
I won’t overdo it, just the basics. For everything else there will be Defiler