I was farming T1 until about 1½ weeks ago at which I stepped it up to T2 and I have to say, the amount of gold I gather basically just covers my needs for gem making, crafting and enchanting. I'm playing bounties and rifts and don't take advantage of any exploits like clearing Hell Rifts in act IV. I think the prices are nice where they are. If you keep running more rifts than bounties (using your friends first keystones), you're going to end up loosing more money than you bring in. I play mostly solo and I have to say that it feel rather well balanced. Right now, I'm actually a bit richer than I was when the expansion was released.
Started the expansion at 280 mil
Now at 302 mil
Lowest point was 266 mil.
PS. I estimate I've spend an average amount of gold on enchants. My most costly enchant was my amulet. It took me about 20 mil in gems and enchant costs to get what I wanted.