Ok, so you mentioned ‘time available to train’ several times in your response. And I have looked at the plan put together by TR and the amount of training time scheduled for each day. And I’ve noted that I have WAY more time available each week than the plan has scheduled (though I certainly don’t want to ride for the entirety of the amount of time I could ride. Additionally, I have tried to increase the amount of available time on some of the days, only to receive the ‘this might lead to you training too much’ message.
So, if I want a plan that has more volume, do I just leave it to the plan to up my volume as my PLs increase? Or do I add more available time on some of the days, ignore the ‘too much’ message, and trust that TR will gradually ramp up the volume to fill that time (presuming it feels my progression is reasonable)?
Basically, I’m used to 3-5 hour rides, especially on weekends, but TR is presently maxing me out at 2 hours for the entirety of the plan. And while I want to do my best to follow the plan and see how it works out, there is no way I’m going to stick to a 1.5 or 2 hour ride once the weather improves and I get back outside. (And, for what it’s worth, I’m also ok with 3-4 hour sessions on the trainer, especially now that there’s plenty of racing on to watch! 
)