yes wasd improves combat contole with a locked camra angle but it removes the strategic pow (point of view ) and removes the rts gene because you wont be able to focus on more then one spot at a time mainly your char, blacking out the entire battlefield. while mouse action gives you the advantegs of moving while analysing the entire battlefield.
well the only flaw i see is that there will be a ton of identical reports because the thread will be overflooded quickly. a standard report form is a good idea i would requst bug subforums instead of threads for better overview and perhaps a info thread with all fixed bugs in it so you dont report already fixed bugs. usaly in a beta the beta server is not completly up to date so some bugs might be fixed already but the beta testers would still report the bug. i would
sliding effects makes the transactions between screens less stressfull on your brain because it can better understand the switch i would recommend the sliding effects with a checkbox so you could switch it off once you know the game better, and i would not recommend it for the UI because you dont want to wait 0.25 sec when you change target for somthing to loadup it would be like dragging a bowling ball striped to your leg while you try to run a marathon. but im sure you already know this.