I have Patch 1.05 and have had no problem with mods from that standpoint (to my knowledge anyway). Most of the mods I use (approx. 100) don't seem to have an issue with the patch number. There might be a handful of mods that the creator applied to a specific build code, but I think that's rare. Most mods are dated, simply because the modders left the field to play with DA2. Some modders, thankfully, revisit once in a while to keep us happy with thier updates/revisions.
The real problem lies with mods being incompatible with one another. This happens once in a while. It's a trial and error kind of thing. It happens a lot with vendors. It takes a very skilled modder to include/test for compatibilty before uploading the mod files. Fortunately, there are quite a few very gifted and conscientious modders who do their homework before releasing their work for us. Then again, there are modders who barely know what they're doing, so their mods wind up causing problems (sometimes BIG ones).
Before I use a mod, I read the comments about that mod. If there seems to be a lot of confusion from users about how the mod is to be installed (sometimes modders assume it's obvious when it's not to most non-modders), or if the user must perform a lot of manipulations because the modder was too lazy to incorporate them, or if the mod mysteriously breaks something in-game (even another mod), or the mod simply doesn't work as advertised, then I don't use it, no matter how intriguing it may sound in the description.
Also, be very careful about your selection of mods before your game, and even more careful about deleting mods while you're still playing that particular character. In deleting a mod, you are made to Force Load your saved game (because some of the original content is now missing!) and this could seriously break the game that you've already invested so much time in. So, go ahead and use mods, but be careful about their manipulation while playing a certain game. If you don't like a particular mod that you've installed, then simply don't use it. You could also start a new game without that mod added to the mix.
Also, use DAUpdater, DAModder, and DAOManager to install/uninstall mods if you aren't doing that already. These tools take all the manual manipulation out of the equation. Once you learn how to use these simple tools, they do all the work for you in matter of moments.
Also, if you add mods for the Character Creator (CC), to add new preset faces, hair selections, eye/hair colors, etc, then absolutely use the CharGen Complier to mesh all these mods so they work together in harmony. The Compiler creates one XML file (if you have multiple XML files in your override directory, then you are going to have problems with the CC, or you won't have everything available that you expect to have).
Now, to the point of your question: I don't know of any filter (other than what has already been mentioned). So I'm no help there. It seems that if one exists, then it's not widely publicized. As has been mentioned, there are mods that fix/improve dialog for specific NPCs, and I've had no problems using those.