Don't worry about this "speedy" stuff. Bottom line is, it's a downer. There's a rush for those "high-up" opiates when you bang it but yeah, totally different. I've had fits of cleaning before or whatever but that's the happy chemicals is all. It's nothing like a coke-induced carpet surf. Dunno if you were worried about that but if you were, don't be. You won't get any more of that feeling using another type of opiate. ...well, unless it's got uppers mixed in. Anyway...
I suggest keeping what you have. Downgrading isn't going to do much for you, except waste your money and potentially your "fun night", haha. Just stay safe, and if you're gonna have fun popping pills, do the smart thing and take higher doses slowly, like you intended to. Best of luck to you.
Oh almost forgot - keep in mind that you've been clean for a while, plus you seemed to work up to a lot before. The lesser feeling is probably from going from a dozen pills to one. Yeah dependance goes down and you don't need to take as much later on, plus it's stronger, but still. You did a lot more before. Keep in mind, that's probably the reason.