Integrated means it's going to be a cast case, some people don't like that either because looks or understanding. Separate also means you can change material for the plate, though most never do and few even offer alternatives. On the other hand, it means the plate is solidly mounted, which I actually like, I don't like a spongy or inconsistent plate feel (it also cannot rattle if loose). The plate on most 60 and 65% aren't even connected to the case, and yeah, that means noise can't transfer, but it also means the pcb is doing all the supporting and since the screws are not in a consistent pattern different parts of the board feel and sound different. I prefer a solid consistent feel then use the switches sort out the feel and sound others try and make the case conform then use a certain switch. Different (key)strokes for different folks. Personally I'd avoid the Tokyo for one reason, the hot swaps. I don't trust them long term, sure you can solder them shut or replace them but that kind of defeats the point.
As for ping and sound transfer, yes, true, but ping is from the switch (try different springs, switches and lube), you're treating a symptom not the cause. While treating the symptoms is limited, you can always do that, so go after the cause and any treatment towards the symptoms will be rewarded in spades.
Basically, don't listen to what others tell you on what to get, buy what YOU want. We don't have to look at it every day, we don't have to use it every day. We will probably never see it, much less touch it, so why should our opinion on it sway your judgement.
