Android Performance on myTouch - Could Be Better

The lagginess that has developed in my myTouch 3G Android phone is a real disappointment. Most disappointing of all is the fact that the virtual keyboard is often laggy--that is a killer. It seems to me that there are a few things that contribute to the lag that should be fixable:

1. The keyboard should be ultra-optimized

2. Ram Consumed by Installed Apps
The G1 and G2 phones don't have all that much RAM, and installed apps eat into it pretty quickly. I don't know why they can't be installed on the SD card. I do know that is one of the things that rooting your phone allows, so it can't be too much of a showstopper.

3. Multi-tasking
Everybody knows that a great advantage of Android over the iPhone is its ability to multi-task. That's great, I agree, but I think it is being taken too far. Android seems to try to keep open WAY too much stuff. I open the web browser quickly in the morning to check traffic, don't use it again all day, and it is still active 12 hours later. How about dialing back the attempt to keep so many things running, just a little, in favor of performance?