Heyho and thanks!
2 out of 3 is a pretty good rate XD
I think the web export is particularly useful to have just because it makes playing so much easier for potential players.
Re-working your engine to fit Spine animations is too much, I agree with that.
As for the cutscenes (with or without dialogue), I was heavily thinking of Skald: Against the Black Priory, if you happen to know that game:
https://store.steampowered.com/app/1069160/SKALD_Against_the_Black_Priory/
For example these ones:
That's the first game that came to mind mind when I learned about your engine :D
Stay funky!
Dez