Adrian had no trouble with ICE units overworking in corners when blown diffusers were de ri·gueur.
Like all new regs & tech changes this is bound to throw up some unexpected changes - for most of us anyway - for better or worse.
Sounds more to me like Adrian maybe hawking for some changes as he can't see how he can get the jump on the rest.
Much as I dislike what we may be in for from Adrian's predicted scenarios F1 has always evolved, either through clever developments & manipulations of materials and engineering, or from rule changes - supposedly imposed for closer racing & more road relevance - but mostly on whims of OEMs or marketing people.
Our beloved F1 has romped on regardless, I expect it will do the same in new era, perhaps some teams will have more of a limp than others come 26.