Rebuild?
Can't you keep the older 200Ts running via rebuilding, or do they just get destroyed/worn out too bad every year?
What does Stihl corporate say? How far up the ladder have the complaints really gone? I don't mean to some dealer or his regional guy, I mean some fatcat german who speaks german and who was born and lives over yonder and has a big title after his name. At least that high. If you haven't gone that high you haven't really complained enough yet.
Have you pro arborist guys tried a petition or something else, do you have any sort of official industry organization setup you'all belong to that can represent you in a sit down discussion with anyone at Stihl who has any power? Do you have some vids showing real world results, the new saw versus the old saw, side by side, right on the job, complete with stopwatch action and no holds barred no censoring "plain speak" on running those things trying to make a living?
Seems like if it is *that* much worse, with those saws being high dollar items, your collective voices might get heard.
Sounds like the thing should be recalled really. Happened in other industries, even with expensive stuff. sometimes they just put out a lemon. It may run, but if it don't *work*, it's a lemon.
Heck, take the stupid things back, demand your money back, say it does not "work" in general terms as you expect and know a saw like that should work. That you don't want a "fix", but that it is a lemon in general terms, it is not a "professional" class saw anymore, and you don't want an expensive "homeowner" saw. Tell them if all they can offer is a homeowner class saw, you'll take your business elsewhere for a similar saw at half price.
There should be no absolute need to pay top bucks for a pro class anything, then have to "mod" it later (even if this is possible) just in order to get your job done. That's just silly ridiculous to put up with and pay real bucks for something like that.