With the tighter tiers of play, I think increasing the range of pregens would be a good idea, just doesn't need to be done all at once.

I personally would love to see a level 10 and 14 pregens set, in addition to the level 1s and 5s, so players could have pregens in high-level content that we're sure to get to sometime.

It'd be nice to have a pregen that could be played in a public run AP of higher levels. Or higher level scenarios as to not exclude folks from playing when that's the only run content at the time.