Park reservations never bothered me. I'm about to go on my third trip in the last 18 months and they were never an issue. However, I can see it suck for AP holders, locals and people who like to be spontaneous.
However looking at availability, everything is green for the next week. So you could mostly do whatever you want.
But I definitely do not like how rigid everything is getting. Toss reservations in with how much you have to be a Project Manager to fully utilize Genie+ it's hard to relax when you're on vacation.
Reservation system isn't a big issue - but the cost of hotels, park capacity, crowds etc. are really the issue. As everyone says, they need to expand the capacity at AK/DHS and finally finish Epcot (and add 2-3 more attractions).
Only way a 5th gate would spread crowds around is if it was actually a great park with a lot of new attractions. Both DHS/AK don't have enough to do to drag people away from MK. Epcot is a construction pit with some incredibly aging rides.