My biggest issue are the combat trials. It's such a missed trick; the combat is super deep, and Chadley's simulator could guide you through it - showing you the abilities and where they work best. Asking you to parry certain attacks, and showing the timing. Maybe make that how the summon stones work (and then have the summon unlock fights in world rather than in the VR space).

After everything, the games ultimate combat trials boil down to multiple boss enemies at the same time, and it just feels like cheap bullshit without building you up for it.