Gmail allows you to set the font size in the email...see settings. I believe the Email app supports that as well, in the DX2 (does on my D2).

Can't help you w/the other issues...when I've used my wife's phone the text has been fine for me, and call quality coming and going on hers is very nice...

 

Since the DX2 is a sharper display, all you can do is alter the font sizes. I just compared, side by side, my DX1, DX2, LG Revolution and Droid Charge..... of all the displays I would say the DX2 was the winner, with my DX1 in second, the IPS of the LG Revolution in third, and surprisingly the sAmoled of the Charge in last. I love the saturation of the sAmoled, however, the whites are SO dim, I just can't prefer it overall. I much prefer the brighter backlit displays of the X and X2. The X2 was slightly "whiter" (the colors of the DX2 seem a tad bit brighter) than the DX. The overall brightness was about the same, but I think the whites on the DX2 are whiter and overall the DX2 display has a little better colors.

 

I have been using the Incredible for over a year, which sucks for text clarity with smaller fonts. The DX2 is far better, so I am happy.

In order to get fonts where I can not read them on the DX2, they need to be small to the point of not being able to read them anyway. Some of you folks must have eagle eyes.