Turn it how you want, they’re optional. You don’t have to kill them to progress. If they stand on the road (never saw this, but I’ll take your words at face value), then just recreate a cession where they are in the pit. You can also just run past them. Or you can even pass through Hanneffy mine and not get near the Pit at all.
Also, dismissing what other people are saying because “they’re people” is incredibly egotic, as if you weren’t a people too. Some builds will have a really hard time against Rekt. Yours happen to be defeated by Acedian. There are other bosses like that in the game that counter some build types, but the build you’re playing at this precise time doesn’t struggle against them, so you don’t consider this to be a problem.
Now, these two bosses are slightly more difficult than other purple bosses, and yes, I mean slightly, as in, in the grand scheme of things. Let me reiterate :
1/ They’re optional. In every sense of the term. You can skip them, they’re only on one of the two ways possible to progress, they don’t drop anything really relevant.
2/ They’re within the power-range of purple Bosses, and no, you don’t need to particulary gear for them unless your build is weak against them, which is also the case of several other purple bosses, some of them being actually mandatory (Crowley himself, Bolvar, Bloodlord Thalonis, Loghorrean,…)
3/ I could also name optional Bosses that are definitly ahead ot the curve, like Sylvarra or Kra’vall, and I ain’t seen anybody complain about Kra’vall when it was released. It was just another milestone for your character to reach. And if you’re arguing that they’re in remote optional zones, then I’ll say that on the contrary, Rekt and Acedian make Hannefy mine relevant again, because previously to them being introduced, you had zero incentive to go through it when levelling a character.