Ability to have sections for each workout such as warmup, strength, assistance, skills, mobility, cool down, etc.

This, together with changing the way we can build our workouts will be a big step forward.
I think this would also solve the request on being able to have a "Multi-modal workout" where you can add circuit, interval and regular training phases within the same workout.

I'd like to schedule warmups/mobility and cooldown routines in the calendar when creating programs. Just like the way a workout/cardio/body stat/photos is scheduled on the calendar.

This is a great idea. Some clients would really find it useful to know which section is meant to just be preparation for the next exercise(s).

Allow us to label Supersets and Circuits within a workout.

Be able to rearrange training plan workouts

Yes, this would be great. If this was possible, I could set up workouts for a day into blocks like
A) warm up
B) Agility
C) Strength

Would be really beneficial

Ability to have sections for each workout such as warmup, strength, assistance, skills, mobility, cool down, etc.

Currently there is no distinction between areas/sections of the workout such as warmup, movement prep, strength, assistance, met-con, skills, cool down, mobility/stretching, etc.
It would be great to have the sections labeled or the ability to create a custom area/section.
It would also be great to have templates for each area/section that could be saved and copied to other workouts.

Ability to have sections for each workout such as warmup, strength, assistance, skills, mobility, cool down, etc.

Be able to rearrange workouts in the training plan to any order I would like to

This is a great idea, everyone has there own style of programing & with different types of training programs,

it would be great to be able to custome write in the title of each section.

Like the original post said, but so that each trainer can have there individual style within there,

For example a corrective exercise program will look very different to a weight loss or sport performance program.

Hopefully the comment is clear, I think this is a great idea 💪🏼🙂

Be able to rearrange workouts in the training plan to any order I would like to

Be able to rearrange workouts in the training plan to any order I would like to

Be able to create a bank of circuits/supersets to import into client programs.

I am not looking for full Master Workouts, but for instance, I'd like to have a grouping of ~15 exercises for client warmups, that I'd like to be able to import into a workout without having to manually enter each exercise every time I make a workout.

There is currently no way to rearrange items in your calendar for that day by drag and drop. The order the items are listed in your calendar is dependent on the order that you added them into the calendar for that day.

Being able to rearrange items so that you can more easily change the order of what comes first, second, last

Drag and Drop Reordering of daily workouts on Client's Calendar

TrueCoach has this feature and it allows you to save the warm-up template in case if you want to use it again. For example, if I saved a warm-up as "Active Dynamic Warm-Up" and type that in a new workout, all of the exercises and videos will transfer over. It would be nice to have this feature on Trainerize too!

It would be nice to have a warm-up template section that allows you to save and transfer warm-ups. This will save a lot of time!

Completely agree. 90% of our athletes programs follow the same structure. It would be great to be able to set that structure up and then use it to filter exercises, sets, reps, rest, tempo etc etc