There's a few questions left within your question.

Don't assume 12 frets means shorter scale length (in other words ask or measure)

Therefore don't assume everything true of the differences between OM and 000 will hold true (ie. ease of bending strings on a 000 as compared to OM)

One thing that does run true, and I like the most about a twelve fretter, is ease of left-hand playing. Since the nut is closer to your body you 1. see what you are doing better, and 2. have more strength in you wrist when it's not extended as far.

Cosmetically I love the difference, particularly in 12 fret dreds, because I love that gracefully sloped shoulder.

Yes it's harder to change strings.

Yes it sounds different and you may love the sound as much as I do.

JH