The buffs/changes on Mythical Bloodrager´s Set are very welcome (and even necessary) for endgame play; with other words: Shattered Realms and perhaps even Superbosses (but I won´t try it…).
Everybody talks about “Damage” but if you compare old and new set, you will see, that the differences are really minor. The old set procc was even better for Crucible (I will talk about that later), if not playing 2H; 5 % Crit > 5 % Attack Speed, uptime was 100 % in Crucible, now it might be in campaign, too (important for Boss Chunks).
Where the set really shines are the buffed and new resistances and changes for more survivability. 12 % Physical Resistance is less than other sets have, but now e. g. Tricksters will have about 27 %, which are needed when going deeper than SR 65. The procc on head is nice, but not overpowering and has already been nerfed damagewise.
“But Tricksters now clear Crucible in less than 6 minutes, nerf them!”
Fun fact, they have done so for a long time. Since Nov. 2018. They are now faster, but not because of the (non-existant) huge damage buff, but because of things like Movement Runes, better nodes in Devotions, more Survivability (which leds to more reckless play), changes in skills and, surely, more skill points from Campaign and Set.
And, last but not least, buffs in Crucible with nearly non-existant bleeding resistance and low health of monsters do the trick. Send in 3 waves with Kaisan, Cthonic Ravagers and some Baros Wradliths…would be much fun for Bleeding Builds.
Conclusion:
I think it´s fine. Please don´t see Crucible as META for this set. Let some Bleeding builds enjoy the massacre…FUN of deeper Boss Shards in SR.