Here we go, R. Strauss
Compared to the only previous fugue I heard, I would say we are growing in this area, or at least it is more focused as a work.
Given that I listened to it many times because I wanted to identify areas for improvement, I don't know if I will be able to explain myself in words.
Starting from the fact that it is a nest of ideas, one could write 10 fugues with the material you have added. I would be more economical (... it is something you often fall into, and not just in the fugue).
I couldn't find the snag; do you know what your piece suffers from? Little strategy was used in utilizing the elements offered by the material. The substantial addition of other material amplifies the effect, but even if we analyze only the fragments presented, they are used homogeneously in the piece more like magma than as characterizing elements. This diminishes the rhetoric of the musical discourse and the evocative effect disappears. Once the exposition is over, it is as if a page has been turned, despite the recognizability of certain fragments on paper.
I don't know, I managed to explain what effectively doesn't add up to me; a continuous development works, but perhaps the discourse should also be kept alive with other devices to be re-verified in the different sections.
The CS (Subdominant) could have been improved slightly, and the management of the mixed Answer—sol yes or sol#—I had also hypothesized it, but then I found the doors opened harmonically by the sol# (and the respective la) to be more interesting. However, mine was just a choice based on what I had in mind.
Anyway, it definitely gives more variety than the simple re-presentation of the transposition of the subject's arpeggio.
The closing seems ineffective to me; I am talking about the penultimate long big chord. Perhaps evoking the trill would help remove the premature sense of a stop, as there is another chord of equal duration after it.
Would you describe the harmonic path of measures 6 and 7 for me?
Considering that this isn't your genre... I recognize the effort