Something I've discussed a couple of times with people but have decided to place down here for input from others and from the Dev team as well, is a discussion upon fiends and other planar summons within Ravenloft.
Simply put, I tend to find the summoning of fiends and other planar creatures in a rather casual manner to be somewhat egregious. Its canonically inaccurate in terms of how powerful, rare, and terrifying fiends are in Ravenloft (possibly the single most dangerous creatures to exist in the demiplane, with their horrifically powerful abilities and manipulation of the demiplanes fabric of reality itself). It does not quite fit, particularly seeing as they are then trapped afterwards. Summoning a fiend would then be a rather rarer and terrible happening, and I think some changes could be put in place to maintain that.
I propose the following changes - that planar beings, be they celestial or fiendish, are removed as spells from the list available to PC's, and replaced with some manner of spell for a Dread Summon instead to better reflect the sort of summon more readily available in the demiplane. With that said, there should be some instances where the summon remains possible for individuals - which would be via the following means:
Blackguard summons.
The blackguard fiend summon is quite integral to the class, and a major part of its roleplay as well. As the fiend in question is most likely the 'same' one each time, it feels sensible to ensure that it is something that the Blackguard keeps, while also identifying them as something rightly 'more' than other PC's.
Items and Scrolls.
Several items in the game allow for fiend summoning - particularly the Stygian Contracts, which I think are great. These should definitely remain for players to make use of, not just for mechanical reason but also roleplay reasons as well. Not least of which these should be for DM events and interactions, plot wise or for crucial character development.
The reasoning behind this is that, well, fiend summoning canonically is a *big deal.* Right now, it doesn't feel like it. I am sure this idea could use some refining. As it stands however, fiends becoming more of the domain of DM event status 'would' give them more of a feel of being as dangerous as they are supposed to be. But if anyone else has thoughts on the matter, I'd love to hear it.