Depends on a few things, personally I'd suggest spending a bit extra and getting a 6650XT/7600 just so you don't have to deal with effectively being a "beta tester".
Certain older games, especially ones you can't use DXVK with (Because of anti-cheat), can be next to unplayable (For example, Halo: Reach in MCC can drop to as low as 15-20 fps, feels like a slideshow at times), some games crash (Look up recent benchmarks, people are still having issues with some games and crashing).
Idle power consumption is ridiculous for the entire lineup, my A750 is usually around 40w idle, best case scenario it goes as "low" as 35w with both my monitors unplugged.
However, because I do like the card simply because of Quick Sync, if it hard worse hardware encoding/decoding, I wouldn't have even bothered with it, I would've gotten a 6600.
However, overall it'll really depend on what you expect/want out of the GPU.
What kind of cooler do you have? Many coolers are convex, so adding washers/contact plate can mean less contact (Although this may not mean it's making it worse since the important part of the cooler and IHS, the center, is still touching).
When people have the issue, it's generally because they're using an AIO that's completely flat, which means less contact in the middle, where all the heat is.