Yeah, applesauce would work, or I was going to suggest a little mushed banana, to mix it in to. I usually just hurry and give meds, and squirt it in once I get the syringe into the corner of their mouth, then give treats after, but if you have one that really fights it, it can be hard. I love it too, when they get all snuggly after meds. I only have one of mine that will do that. Usually most of them want to get away from me, and foot flick me on the way out, haha.
With his diet, it sounds like he is getting the right amount for his size. You want his back area and rump, to feel fleshy and not boney. If his bones seem to protrude, feel sharper instead of rounded, or his rump looks flat instead of rounded, then you may need to up his pellets a little, as long as he doesn't have digestive problems with carbs and sugars. But if he seems fleshed out and healthy, then that amount is good for him. All my buns get really excited about their greens and pellets too, and scarf them down, and have timothy to munch on the rest of the day. If your buns poops are all uniformly large, and don't vary in size from small to really large, then that is pretty normal, and usually just means a rabbit is getting good amounts of fiber in it's diet. Now if they are seeming super large and aren't round but are oblong shaped, then there may be something else going on.
I'm not sure about the matts on the feet. I've never had a breed that had long enough fur to get matts. I know some people have had to cut them out, but that always makes me nervous when I have to use scissors close to my rabbits skin. If you have hair or dog clippers, you may be able to use those to shave the matts out. You could try brushing them out. Hopefully someone that's dealt with this, will chime in. But I think when you have a rabbit that is prone to them, you just have to either keep them clipped, or brushed.
BOO. 
