One for all and all for one 4

If the template is random, then the castles should be fixed. The idea behind the "Bishop system" was that the castles were chosen first, and then the random template. And after playing, for example, 8m6, you would think about whether to restart in order to get Jeb with the same pair. Priorities in the draft change accordingly.

In the draft with 15 templates, there is no point (unless it's a decisive game with a tied score), because in 95% of cases, players will choose something from the standard set, and increasing the pool of templates "just because" is not quite right; you could even put in 50 templates.

The essence of the previous system was to force the opponent to play with the most uncomfortable templates, i.e., to play on your own terms. This is a perfectly reasonable idea.