Seriously? adding abilities, natures, a EVs in third gen wasn't big? Can you imagine how big the difference the metagame would be without them? or what about the physical/special split that made a bunch of pokemon good because they weren't locked into being special or whatever. Even though 5th gen brought less obvious changes it gave every old pokemon a new ability not to mention the meta went from all day walls to a very quick sweep meta. In contrast, adding new forms to 6 pokemon is nothing compared to previous gens.
Not to be rude, but may we get back on topic?
We're leaving smash and getting onto Pokemon.
But to answer your question, yes and no. Either you spent hours trying to get the BEST Pokemon, or you didn't. Now-a-days, all you need is an action replay, and time. Level: 1, Select Pokemon, launch the game, search for the Pokemon you want for a couple of hours, find one with good IV's and nature combo, train it, give it moves/an item. Done. Sadly, with the addition of the Action Replay, I stopped playing Pokemon competitively, since now my local competitors now had easy access to the Pokemon they needed. Abilities, Natures, EV's/IV's just became more hurdles to jump through if you wanted to enjoy the game and have a powerful team.