Hi! I appreciate that you took the time to craft a lengthy reply! Hmm, to elaborate on what I felt was a bit pedestrain, it was not the tempo. I would say possibly the playing techniques used is one of the main parts that I felt was a bit pedestrain. Maybe you could include more styles of playing techniques? I will draw some examples from the strings your orchestration was mainly using strings. You could have included different playing techniques especially given the strings' wide range of such. For example, pizzicato, glissando, harmonics, ponticello, spiccato, martele, marcato, sul tasto, you get the idea. I feel the piece can be elevated to an even higher level if you included such techniques. Especially with the midi simulation where the sound of arco strings started to become a bit grating, it would have been nice to have say a pizzicato in the middle. Even say a simple change in say bowstrokes such as a slur-staccato rhythm, tenuto slurs which make it sound half detached would have been very interesting. In addition, maybe including a rhythmic motif outside of the theme that is easy to latch on to could help? It would provide some continuity especially in a medley where more continuity is needed rather than a theme and variations, some sort of continuity other than just the theme would have helped. In addition, the note values you used were often similar throughout the medley and unchanged for most of theme, and for a piece that needs to develop the theme, that could have been far more explored. Another point I found slightly pedantic was the register. You took a very safe route with the registers of instruments, especially with strings I would say. You could have included a cello melody say in the treble register or violin playing very high notes. You could afford to be more adventurous in your instrumentation.
Also, I forgot to mention in the first reply, the articulations could have been improved. For example, m. 65-86, coming as a string player myself I feel the quavers in the strings would be better off slurred.
I would have preferred it if you mixed up the fast and slow sections so that they're alternating, because it will draw out more contrast than say going from the slowest to the fastest material.
Yea, I think I did not word it properly in my first reply, my apologies. The countermelody is there but needs to be more distinct. I would say that while there is countermelody, the issue is more in the orchestration and instrumentation. The countermelody could have been better executed and be made more distinct, yet it should be more memorable so that it really stands out and feels more like an independent voice in the middleground. This may have due to the midi simulation, but that was my thought after listening through it again. Maybe what you could do is make the background softer? Or make it less interesting so it does not hog the attention of the middleground. Alternatively, you could alter the register so that the countermelody is in its own unique register. Especially since your instrumentation has extensive doubling and many parts played in the same register, this is just going to muddle the sound of individual instruments and make the countermelodies and canonic imitations you mentioned get muddled and unintelligible. I would also say that you could add more instruments into the background to make the background sound richer.
I hope that clarifies some stuff!