2pc and 4pc set bonus should both be correctly working in the latest beta. If you feel it is not, please upload your character file, so I can examine what might be causing it. I cannot help you, if you do not give me a character file.

For me, it clearly ranks T7 chest (10 and 25man) far ahead of Undiminished Breastplate.

edit: Relative Stat Values are being very wonky for Rawr.Ret for some reason, the best way to compare stat values at this point would be to compare gems. Like the worth of 16 str gem vs 16 hit.

edit #2: I fixed the issue with Relative Sat Values, they will be accurate in the next beta release.

Yes, the more items you mark available, the longer it will take. Only mark items available, which have a chance of being useful.

I couldnt believe that it can become unreactive on my quadcore, now i'll try with a reduced amount of items

The optimizer is selecting Items with Gems that are marked as not available. In my case it is the Meta gem in the helm. I haven't made the 32Sta/2%armor available but the optimizer sets it anyway. I will raise a bug on codeplex.

Looking at my warrior and unless i'm mistaken it looks like RAWR is still using the old 9% hit cap. It should be changed to 8%. If this hasn't been done yet can it be updated with the change please.

Also as an added note. For a Warrior a Metagem template using a Relentless Earthsiege Diamond 21 Agi/3% crit damage usually but not always ends up providing more dps. It only requires 1 blue slot as opposed to 2. This would be nice if it was incorporated into RAWR as one of the 2 default Metas for warriors. Yes i can manually do this and have done so. But redoing it after each release isn't very efficient. Not many warriors actually know this and it would be beneficial for them if they did.

Somewhat inconsistent, everywhere you mark the items to choose from, but for the gemmings it is not taken into account. Either you remove the selection of the Gems or run with the template. After checking the Template thing, I think the better solution is to run with the template.

It's not a one-or-the-other thing. You can combine both. If that option is on, gems in gemming templates are considered available, in addition to any other gems you have marked available.

New beta soon? Tons of updates have been made in the last 10 days.

Yes, new beta Soon™. Especially want to get the new multithreading stuff out to people to test. Should be a 40-100% speed boost for almost everything, for almost everyone.

What sort of impact, if any, might these changes have on how Rawr runs under mono?

I'm very eager to test the new multithreading stuff. I also noticed that you seemed to be doing the work on the warlock module. Does this mean you will be updating the rogue module when you get the chance also?