I respectfully disagree about dumpers being ineffective.
I have not yet seen anything to suggest that shooters will be able to track moving goals accurately enough to score signifigantly better than dumpers. And while dumpers may get very few chances to score per match,
when they score, THEY SCORE
I do agree that such designs have the potential to be topheavy. However, we have found that the hopper can be built very lightly. Well engineered, such a design should not have problems with this.
Aside from the bumper issue mentioned by Tristian (see discussion of 842's robot for more on this angled front issue), looks great, and rather similar to what we are doing. The only differance is a couple of small things in the lift mechanism, a slightly different ejection system, and it being in wide orientation.
May I ask what advantages you are gaining by using a side wheel pickup, rather than an overhead design? We have found that an overhead design is much more forgiving in terms of aiming at the ball, which will be rather useful with the floor. Also, could you give more details on your release mechanism? It looks to be some kind of belt, but it is a bit unclear how it works.
Looks great, keep up the good work.