Kazuya's DF2 locks down many evasive options and Feng doesn't get a great punish on it. Consider parrying it with 1+2 or iWS1+2. If you delay back kenpo so Feng hasn't stuck his right arm out when DF2 hits, you can back kenpo DF2 in most situations and KEN3 it on reaction for a launch. This will still evade most his pokes.
Feng's high crushing command dash is a good way to approach Kazuya without being hit with an electric.
F4-4 heavily deters trying to EWGF whiff punish F4.