It's too early to give a grade, obviously, but it's safe to say Houston didn't do as well as some teams out there, and certainly did better than some others. Other than that very broad "grade," not much else can be said until camp gets underway.
I expect Travis Johnson to be on the field a LOT, because I'm confident that one of the current starting D-linemen won't make it through the season.
Personally, I would've gone O-line before picking Morency, but I wasn't a fan of the Jason Babin trade, so I should shut up about it, right?

Again, it's likely that DD will miss some games--and when he DOES go down, he'll have to push Hollings off the stretcher to get out of the stadium. Depth was needed.
LOVE the Mathis pick. This was a blue-collar, bargain version of Troy Williamson...pure speed. Could end up being the deep threat Corey Bradford was supposed to be in 2004. If he's as good as advertised (and Kiper wouldn't shut his yap about him being awesome), then that pick was a steal.
The Hodgdon pick was also needed...many around here have been griping all offseason about McKinney, and even though I still say Wand's the #1 problem on that line, the better pick at that point was at center.
Below that (and possibly above that!), I'm not qualified to offer an opinion on the late-rounders. I'm glad the Texans stuck to their guns, and the only thing I see as a serious gripe was not addressing O-line earlier. But again, let's see these guys in camp before they get verbally abused (or deified) in every post!