@mearls
It'll definitely be simpler and faster... but will it be -better-?
I don't feel like it will. A drum I've been banging on for years is that the best way to allow a Gish to exist is by letting them cast and attack in the same turn, so they're not being half a character at a time. Part of why I like the Eldritch Knight's design (though I'd have put War Magic in differently and earlier).
Not that bonus actions are a super huge part of that, thanks to the spell design for the most part.
As far as removing modifiers from damage: that's cool? Personally I'd rather see it happen the other way around. Get rid of rolling for damage and just add your modifier to a set value for a given weapon or spell as someone mentioned upthread. Doubled Randomness isn't really useful when you've already got a binary hit check.