I think competitively, one can see the impact of the changes most clearly in EG vs SNA game 5 and the Navi.US vs SOTP series in Canada Cup. In the former game, both teams (mostly EG) were scared to death of giving away a giant bounty, so they pretty much just farmed for 80% of the game. EG just waited and farmed creeps until late late game where they could just take one fight and then raxx without too much risk.
In the latter series, Navi.US picked spectre and AM in games 2 and 3 respectively. Both heroes got completely shit on for 20 minutes, but the comeback mechanics catapulted them right back into the mid-game and the more early game oriented gank lineups of SOTP fell apart after just one or two misplays.
I've pretty much completely revised my opinion. The gold changes make absolutely no sense to me and conflict with too many of the game's mechanics (especially heroes that are meant to create a gold disparity), feels like it cheapens the game and it doesn't feel like dota. The xp rubberband, however, makes complete sense. I'm fine with that, just fucking change the gold catch-up.