I have shot the rage 2 blade since the 3 blade is illegal in NY and I found that there is a considerable lack of penetration compared to fix blades. I shoot Steelforce Phat Heads. Before I would switch from a fixed blade to a mechanical, I would rule out bow tuning or shooter error. To go on further....

Since you recovered a deer with a mechanical (flies like field points), you may want to go over your bow again to make sure it is tuned properly. I lost a deer two weeks ago, very similar to what you described, lack of a blood trail, but the reason for the lack of blood trail was a poor shot on my part. The deer came up on me quick and I rushed the shot - simple as that. I believe I torqued the bow and the arrow went about 8 inches farther back than it was suppose to which ended up in the liver. To ensure it was not my equipment, went back to the house to wait the deer out and I pulled out the target. I was drilling it at 34 yards, the yardage I hit the deer at, so I know it was me and not the broadhead or any other equipment issue. We went in that night but the coyotes already were on the deer, turns out that deer was not mine as I had a pass through and this arrow was still in him (shoulder shot). Never found my buck after 3 days of searching, first one I lost and it all amounts to the shot placement. Lesson learned for me, let him pass if you are trying to get a shot off quickly.