the answer is no.
baseline is not 4/8.
at baseline Regeneration has the tools necessary to play effectively.
when pushing the envelope there are various ways to take on higher level content. the least optimal method being: run
hmm, maybe I am doing it wrong.
maybe the method of taking a bit of damage first and then occasionally using DP as a ~30% heal and also then boosting max hp is too efficient. (some regeners don’t even need to use DP all that often instead saving it and applying it situationally)
meh, only at the highest levels is anyone ‘funneled’ but the same happens with other sets and ATs with IO selection, power picks and incarnates. I blame fotm builds rather than game choices.
I am not saying you are right or wrong these are merely my thoughts on the subject where my opinion diverges.