I can see that, and Red Light Green Light is definitly high value… If you train strictly according to a TR plan, or only add an outdoors ride here and there I guess you don’t even really need Workout Level 2. RLGL and adaptative training get you 95% of the way there.
But if you are like me and train 40% TrainerRoad vs 60% outdoors or added volume it doesn’t quite cut it. I don’t do enough TR tempo - sweet spot - threshold - VO2 - anaerobic - sprint workouts to have Training levels mean anything whatsoever to me. Currently my VO2max and Anaerobic levels are correct, but the rest is just non-sense.
There simply isn’t enough rides taken into account by Workout Lvl1 to give me a meaningful workout (let alone the “right workout, everytime”) at zones I don’t touch much in structured training, although I do touch them regularly.
I could let AI work it’s magic, but the training block would be finished by the time I get a workout that is remotely productive. Or I could just wildly guesstimate my level and do a workout there (which I do), but even then it takes weeks to zone in on the right level. By which time the other zones have started decaying into uselessness again 
