Personally I have had punting sucesses with EEs, particularly with Poles, but others too. If you mean Roms, and the Derby Hungarians then your post contributes nothing new, and over generalises. There are exceptions.
There's no avoiding research. UKP is your best source of data but in the absence of any factoids the same level of risk management strategies are required for all WGs, including English.
To score a success you have to raise your game, keep Dick out of your decision making, and remember its gash for cash, nothing more.