Pathfinder 1E Paizo's backwards compatibility

[Voadam]

Depends a bit on what spells are changed. There are a few spells that are based on caster level vs HD alone, and they are broken if you leave the expected values.

I have witnessed this already in Shackled City - there was some kind of Half-Fiend monster with a spell-like ability like this. I think it was - against my first assumptions - totally by RAW, but basing the caster level on HD who were notably higher than its CR made this ability a lot more powerful then was appropriate. And I believe there might be more "hidden variables" here at work that can wreck a game...

Blasphemy from half-fiends and certain full fiends like Hezrou. No save powerful effects like dazed no action for a round from a 40' burst.

 

[Maggan]

For me to continue to be a Paizo/Pathfinder customer, the backwards compatibility must allow me to run the new modules using standard 3.5 characters.

For me, I want to be able to mix PCs of different classes taken from my 3.5 material and Pathfinder material. That is a must for me to play Pathfinder. I'll buy it, because I said I would when a hypothetical 3.75 was discussed. But to play it, I want to be able to bring in lots of elements from 3.5 straight into the Pathfinder framework. With minimal work. Classes, feats, skills and monsters. And NPCs.

A tall order, but then again, that's what I need from the Pathfinder RPG to play it over 3.5.

/M