As far as "could this work" the answer is pretty much anything will work if you are lifting with enough volume and intensity, and if it's allowing you get stronger over time.

So whether you do pyramids, or reverse pyramids, or straight sets, or drop sets -- it can work if you're using a reasonable amount of training volume and you're able to make progress over time in your lifts.

What's the reason behind switching and how has your progress been over the past 2 months or so?

It's not that I think switching is bad necessarily, but I think the question is important.

There's no reason not to use pyramids if you want to change things up. 10/8/6 reps, add 5lbs for upper body and 10 for lower body to each set. Pick a weight you can get 10 reps of fairly easily, that'll give you room to grow over the course of a few weeks. Each week add 5lbs to your starting weight.

The only thing I'd add/interject here is that you should pay attention to overall training performance if you're going to do something like this. Just for one example, I have better overall training performance when I pyramid in reverse (after warming up and doing some ramp-up singles, doing the heavy set first, and following with the drop sets rather than starting at the light set and working up). My belief is that this difference in performance taken over the course of a long training cycle can make a significant difference.

That's not to say that it won't work for the OP, but it's something to pay attention to.