Am I having deja vu or is this like the second or third thread you've made about going back to piddling with compounds? Either way, I am very much in a similar camp to
@NMSbowhunter. I shot my longbow almost exclusively last year until I got a deer with it then I pulled out the compound and had some refreshing hunts with it. I don't have the stuff to work on my own compound but they both have a place in my hunting arsenal. I thought about selling mine, even listed it once or twice, but I am glad I still have it.
As far as single cam bows I don't think a whole lot of people still make them, but I could be wrong. I know Bear and PSE does, but the old archery heads I talk to say the mathews z7 and switchback are the best single cam bows ever made. Regardless if that is true, considering how cheap they can be had for, as well as your past experience with mathews it may be a good option for you to scratch that compound itch. My buddy had the newer PSE single cam and then went and tried a used switchback and sold the PSE. I shot it and it is a sweet little bow. It feels very compact and agile, which would be nice in the tree when moving around for shots. I have heard good things about the Bear bows but I have not shot one myself.
I don't like how fat most of the bows are today either. I have an older Elite Synergy and I very much like the single solid limb design vs the split two which makes the bows so wide. It isn't a single cam but I really do like its draw cylce. I am not sure who is still making solid limb bows though.