The room correction facilities are still naff, completely unusable IMO - you need to mess around sending measurement files off to DEQX and they give you these correction files back, I tried it and thought it sounded worse! The speaker correction is good on it though and I can't fault that. For room correction I've grown very fond of a clever little program called DRC which creates a modified impulse response which is then applied through a convolver. The only real downside to this is you need a really top flight mic to capture the initial impluse. I gave up trying to use the Behringer ECM8000 and rented an Earthworks M51 and matching mic-pre for a couple of weeks. Another which some see as a downside is using a PC for source duties. Not a problem with the pro audio soundcards from the likes of creamware, Apogee, EMU, Lynx, Digi and RME. As far as digital goes these boys are at the top. If your an analogue fan then clearly a PC is *the* antichrist though.
A word of warning though, DRC needs a fair amount of understanding to fully harness, it does come with some presets that are simplistically named mild, average, strong etc. and these simply set the level of blind brute force applied to the correction. Non worked particularly well with my room. Luckily the author of DRC includes a rather hefty .pdf which helps to fully configure every aspect of the correction filter and also helps to identify where the variables should be applied through reading the data contained in your initial room measurements. All that's required here is a little time to understand rather than an IQ of 170, so don't be put off.
Once I'd dialed DRC in, I couldn't believe the difference between having it on and having just simple upper frequency correction in the form of 2" foam treatments on the walls. Night and day stuff here, not subtle at all. Good DRC imparts a sense of absolute coherence from top to bottom and in all aspects of the sound. Easy to get wrong and tough to get the best from it, a little time and its impressive stuff though.
I think the primary reason why the Tact and DEQX suck so badly at room correction is the fact they aren't particularly configurable and the simply don't have the DSP horsepower to enable accurate and transparent correction - the PC does luckily.