Have you tried out Aspect Summoning/Forms from Magic+?
When Magic+ released (by Teams+), the big ticket item was Essence Casting, but I haven't seen much discussion about Aspect Summoning and Forms.
Aspects are basically a set of abilities and templates that you can combine to get the specific creature you want when using a battle form or summon. For summons, this means you don't have to reference the bestiary to find what you want to summon, though you don't gain access to the unique, signature abilities that you'd get out of the bestiary. For battle forms, this means you pick what template and abilities fit the creature you want to use, rather than the current MO of picking a specific animal from various similar options. The templates often grant unique actions themselves as well (which is something I felt was missing from a lot of battle forms in the base game), and then the abilities that you can choose add another layer.
However, there are a LOT of templates and abilities in the book--14 pages with 2 columns per page, with 3-5 options per summon/form spell. Reading it over is kinda intimidating.
I'm curious if anyone's tried it out and what their experience with it was like.