Yeah I wrote that really poorly. It is 2 sessions per week of 90 mins… of which it is only like 70-80 mins in zone. It isn’t ridiculously crazy, but feels like the top of what I can do right now.
I also have a stressful job and two young kids so I rarely get more than 6 hours of sleep. This also impacts my form a lot as I get into later week workouts.
My AIFTP was actually last week and it tried to raise my FTP 15Ws. I bumped it down to only a 5W increase after doing a 20min test. I am pretty new to riding, but I can tell that I have a very flat power curve so I think it looks at these SS intervals and thinks I’m a lot stronger than I am.
This is 100% part of the case. I just started riding in June and got relatively fit through the summer. Started structured training and SS felt way too easy for me below like a PL of 6. I think I adjusted up with alternatives way too quickly.
I am new to riding (started in May), but has become very clear to me that my power curve is very flat. Top end power is bad but can hammer out a lot of Sweetspot (I just did 105 minutes at 91% of FTP in a Zwift race last weekend). I tried a 20min FTP test recently and basically had minimal improvement despite rocking these Sweetspot intervals. It is pretty clear to me I’m just weak trying to ride above FTP.
Yep, I am very similar. And to be honest, I did this to myself – kept adding more and more volume but not enough intensity. If I had followed through TR provided plan with proper base/build/specialization cycle, probably would be in different place 
Based purely on having read so many similar narratives here, my only suggestion - and it is only a suggestion - is to be more trusting of the TR system and have a little bit more patience with it.
Second guessing it on PLs and AIFTP changes is possible, but the general consensus is that it does a good job of making you faster, if you let it.
It is by no means perfect, but I think the years of collecting data from users and converting that into sound training plans makes it pretty decent really.
You’re right! This is a great option if you have one or two workouts that you want to exclude from your PLs, but if you’re trying to tackle workouts of different levels every week, you’d end up using Workout Alternates regardless.
This is great for most athletes to know though if they find themselves in that situation of completing a high-level workout and getting stuck with a PL that’s much higher than they feel is sustainable. 