I have to agree with you on all points there, and honestly, I'm on the 'no more new types' wagon at this point. We got Fairies, and it failed to shake things up the way that I personally thought it would. It just goes to show that GF doesn't know what they're doing anymore. With 600+ Pokemon, you can't just go, 'They nullify dragons and don't really do much else,' like they did with Dark types, where they don't do much aside from stop Psychic-types, which worked when there were only like...5 in existence, and only 2 good ones at that.
Speaking of questionable creative decisions and mega evos, what do you think of Mega Sceptile getting Lightning Rod?