Nothing new from me that isn't already posted, but:
1) if you leave the cost of crit/dmg pots that high, I'll stop buying them. I buy new ones every raid or at least every other raid, which means 3 or 4 times per week. At their current price, I'll rarely if ever buy them unless the free points I get increases. I'm not spending an additional $4 or so every raid.
2) Port costs are absurd. As they were, I probably bought a dozen each month. At their current price, I'll buy zero per month.
The cost of someone buying their way to a full t5 set is so absurd I don't really care if you take that out or not. If someone is stupid enough to spend $1,000 or whatever it takes to get full T5, have at it. And at this point, T3 is so played out it doesn't matter to me if you give everyone a full t3 set in Tortage.
My advice would be to nerf T5 after Yak. No new guild will ever kill Vistrix in its current state. Give the nubes a chance to finish T5, and finish the easy mode for T6 and Slithering Chaos. Would go a lot further towards keeping bored and wavering players in the game, and might bright back a few who got bored with doing T3 and 4 over and over again.
The only thing that keeps this game from being a reasonably stable source of cash for funcom or their successor over the next few years is incompetence. If you keep players happy, they'll keep sending you $.