if you want a commander template (same for bomb btw) the mdl would have to be member only (api restrictions afaik). do you guys want that? ;)
Unless MotD can program the clot so that it auto-vetoes any templates that the player doesn't have the required specs for, in this case membership.
That would basically mean that you have to choose if you want a membership or not with the account you are using in this ladder.
If you don't have you have some auto-vetoes which could actually give you an advantage over others since you know you don't have to prepare for those specific template while members have a change to play those templates against each other and get a small disadvantage of having a larger pool of templates they need to learn.
An option to work around it would be to give members then more vetoes which they can use on whichever template they prefer to use it on. When adding new templates for only members to the list you automaticly will also need to increase the number of vetoes for members as well and finding a balance on how much vetoes you get for a certain amount of member only templates might be hard to find as well