I definitely understand the concern. However, the issue with the governors in the past, AFAIK, was around the CPU speed being set too low during boot, and the resulting undervoltage due to that would cause the boot process to hang. You can still mitigate the potential for this issue by setting the scaling_min_freq, if you choose to pursue that route.
I wouldn't personally recommend enabling WED at this point because it seems to be exhibiting odd behavior and there is a lot of discussion around it in more recent posts here:
I will say, when I have seen WED working properly, it is quite impressive the positive effect it has on CPU load in the TX direction (from the AP). So once it is working more smoothly and consistently, I would definitely keep it on your list of efficiency tweaks.