Fix for the laggy keyboard is twofold...
First make sure you are not running Visthidebattery (as it seems to cause its own lag issues with the Touch pro)
Then install the following cab files.....
RR Keyboard Speed Increase.cab
Disable xt9 cab
Soft reset device
Despite the latters name, it does not disable the Xt9 keyboard but somehow prevents it from being the sole selectable keyboard.
Thread from XDA....
http://forum.xda-developers.com/showthread.php?t=436795
Sorry if this was posted before on this thread. I searched the thread for all entries containing the word keyboard but did not see these cab files listed. Working fine on my TP with Mightys 4.9.3 Sprint CDMA.