I'm starting this conversation now. What is the plan for back patching to eailer versions going forward; and are we able to do it on Epic's version?

Because these are unknowns in my mind, I haven't even bought BL3 on Epic because idk if we could back patch on Epic, and have been waiting on it to come out on steam. (unofficially i've seen it as April 2020).

Does anyone have thoughts on this?

You can surely downpatch on Epic, as well as remove hotfixes that are added.

Is that someone you can do on Epic or will we need a program from the community, like we did with BL2?