I very strongly doubt that anyone could be turned off by just that one feature. The target audience you seem to be describing would take one look at ReC's "figure it out yourself, copying a tutorial is a carnival of pain, and even it does not explode, you will tear your hair out trying to find out why your reactor does not work" design and go download BigReactors instead.
Also, options that violate my fundamental overarching principles are ones I do not want to add. For one, they risk becoming standard or seen as native because "big pack A" set it - remember the "HSLA as ingotSteel" incident - which is a major problem. Two, it opens the door to more and more people asking for more and more dramatic changes. You laugh it off now, but I start adding configs to turn off reactor meltdowns, and soon we will see requests for configs to turn off other failure modes, then some of the machine requirements (like temperature or pressure), then some of the gating, then actual design changes (like a "simple mode" for reactors were N cores = X GW of power) then ultimately...RF again. You may call all of those ridiculous, but each and every one has already been demanded by someone, and each and every one brings it closer to the design of mods like TE, making it highly likely to be desired by someone who wants that kind of "unified gameplay" in their pack. I flatly refuse all such demands now, but were I to start going down this path, those refusals would be painted in a less and less flattering light, and we would be right back where we are now, except the argument would be "Reika is being too controlling by forcing us to use his power system".
I fail to see how.