The issues with Flash and browsers have nothing to do with WGT...the first "pepperflash" issue a few months back..Adobe came out and told users the work around.
There is one more thing I can think of...try a search for "latency fix"...I believe by leatrix?..or similar.
Also, if you are going to play on I/e, there are some workarounds with "infinity" and selecting processors, via the task manager...I used to do it with IE7 way back when., unsure if it's still relevant now, I think "andyson" posted the info a few years back, a search might bring it up.