I don't think we will get level 5 anytime soon. In 5e level 5 is a huge jump in power for all classes, and I think the whole point of EA is to iron out things and collect data/feedback on early level play. Similar to what they did with DOS
I know it may sound like a self serving argumentation, but I'd say that if anything that makes it for some excellent testing material.
It will, I just think that right now there are enough issues with Actions and BAs and weapon rolls and all sorts of stuff that to pile on top of a shaky framework would obfuscate issues more than reveal them. Once single strike stuff is solid, we'll see a lot of issues, I am sure, with multi-attack. Shooting twice from the same position where one was 80% chance to hit and the second 50% I can't imagine NOT happening. Im guessing they were very specific in NOT doing level 5 yet for a variety of reason. Gonna be a heck of a phase 2 though haha.