I totally agree with every single bit of this wise post.
It really touches some important points that I defend as well, like the fact that trainees should be hard to train and should be quite unique; it's the main reason why I'm a bit reluctant towards Yeti's ideas on the matter from last page, despite I consider them understandable and well thought.
The main point is that it's quite difficult to create some good gameplay that revolves around our concept of "trainee/Est character", and I humbly admit that as of now two out of three of my trainees might have a lot of difficulties getting on par with others. I'll have to polish things some more before the release.
First part: Yeah, that's it. And they do join pretty early. =)
"Ewan" autojoins at lv.1 in chapter 2, "Ross" can be recruited in ch.4 and joins at lv.6 in chapter 6, and "Amelia" will be recruitable at lv.7 in ch.6.
Second part:
I'm pretty sure that there are some weird conditions for trainees to have 3 promotion choices (clear Ephraim + Eirika routes first) and I'm not exactly sure how to allow that from your first run...
Yes, the plan is to make them as unique as possible, to reward the effort invested in training them.
Some mixed feelings here, which make this post particularly precious.
Especially the bolded part, and don't worry, you won't have to do that.
Buh, Faratrass, the main Lord, uses dark magic. :3
She is the first unit you get. Can that be considered "fairly early"? Eheh
Super Trainees... right.
I was wondering if people liked super trainees or not, because they were relatively inferior to other promotion options (at least in the western games) and their animations just didn't fit their tier2 classes
At last, I think the best for trainees would be to give them their unique class (super trainees) making them, uh, more 'unique' than how FE8 did, and maybe some other class that is quite uncommon or unused at all by other characters.