Any kind of barrier you mandate will diminish that.
And the barrier under discussion for v7 is much lower than the barrier in place currently. Its a step from 'no' all the way past 'maybe' to 'yes, with these conditions.' That is actually a pretty substantial change, and though it doesn't affect my efforts at pack-making at all (personal use only - and I only change configs) I applaud it.
Agreeing with others who have mentioned in this thread, a list of customizations to mods should be included in a modpack. Other mod devs should follow this example in providing a page for it in their in-game books for pack authors to use. If more adopt it, I hope it'll become common enough that its the expected thing to do.