Thanks.

The problem with respawns outside is they just get annoying if you need to run back and forth somewhere, stopping continuously to kill the same creatures over and over. Generally for caves, you don't need to keep going back, so respawning isn't as much of an issue.
That's where the transformation in dragon's form enter in the gameplay... Taking advantage of it is much possible if the enemies respawn outside... In a cave it's simply impossible to save your life with it when it's too difficult/you need back-up/runaway is your life-style or others reasons... You must find a way in human form and that's all.
In truth you can absolutely finish the game with just five or six minutes in dragon's form... With a respawn outside your dragon's form is not just an option, it's a way to keep you in live (even if you just use the fact that enemies disappear when you transform).
It's also easy to make a respawn when you go away in another "region" like Orobas fjords or Broken Valley... Like that the respawn take place when you're not here in a larger place (so the respawn is sneakier.)
It's also possible to make the respawn's point adds enemies randomly... Different enemies, different locations... It's just a little longer to do but can be "copy/paste" after (for the gamers it's just a random spawn even if it's a copy/paste of spawn's point).
With some enemies like wyverns, dragons of Damian and others in some places it can revive the dragon's form experience and make it more than useful: A necessity/last chance in some situations.
(Did I seem like an utopian?)
I really think you're right Alrik, it's a great possibility. An entrance in Aleroth... Some made by Damian when he launched his attacks... That's indeed a good explanation for respawning in some places (not in the dungeons and others... But nevermind...)
(Sorry for my passion, I really love that game and it's for me the best dragon's lore video game I ever known.)