It sounds like you're trying to convince me of something. If so, say so.1) I don't see how having an extra +1 to +3 due to DM discretion is ambiguous.
2) Not true, you can take default array.
3) Well, that's personal, and 4th Ed specific, after DMing 4th Ed for 10 sessions or so, I grew to despise the AEDU format.
4) I love it, no more +37 to hit and such malarkey,
If not, kudos, 5e sounds like your kind of game.