The Mac P1 probably straddles a bit into Tier 5 as it has some proactive elements, but mainly for aero effect. For instance, it still can't "see" that it's about to hit a 4" tall bump with one wheel and lift that wheel alone proactively to minimize the impact, which is what a full-active setup can do.
But both Tier 1 and 2 (along with the rest) absolutely DO control comp/rebound damping, which is what twisting clickers do on a non-ES bike. Tier one just has some presets that you have to choose from manually, while Tier 2 changes between presets on the fly by itself. This what
both the 1299S AND the R1M do, and it is simply an OEM application of Ohlins Mechatronic. Which is a good thing!
And as for going Base because of it, I think that's the wrong take on it. The real value of these adaptable electronic systems is that they eliminate a good bit of the compromise you have to make in setting up a bike. To get acceptable daily ride quality on what passes for roads these days you need softer damping, but then you lose the pitch control you need for heavy braking/acceleration. If you stiffen it up for hard riding, it beats you to death when the roads are rough and won't let the tires stay hooked up over course surfaces. And virtually ALL public roads are rougher than racetracks.
The earlier Tier 1 system didn't really interest me either, but the new one is a real improvement for road use. Could it be better/more advanced? Yes of course, and it will be soon enough. But then so could and will be the TC/ABS/Etc. Progress never sleeps...