Could probably be named more in terms of performance level, and not low, medium, high etc…
- Base Plan - Start here, regardless of fitness. Perfect for those who want to add additional Z2 endurance rides on the weekend.
- Enthusiast Plan - A good plan for those who have trained for a few years and know that they can handle the load. Not recommended for anyone with less than 2-3 years of prior structured training. We still recommend the Base Plan for most riders.
- Pro Plan - If you know you can handle the load, then you know. Not recommended for majority of users. (unlocked after user actively unlocks this plan and checks a little check box saying that they understand that this plan is only recommended for the top athletes)
Basically makes TR a 2 plan program, where Base Plan is the default, and the Enthusiast Plan is only recommended to those who have ridden for awhile. Pro Plan is almost taken out and put behind a wall.
Its hard with naming, because you want the “Low Plan” to not make users feel like “oh, I can only handle the low…” but make it the standard, recommended plan 
So users don’t always feel like they want to be able to say “oh yeah I can handle the Mid Plan”…