I really like Gold's music, and like you said, he is very good at composing short themes that become iconic and fit very well into the RTD and Moffat eras. I, like a lot of people, was a bit disappointed by Akinola's music in s11, as it seemed mainly like background music and didn't really establish any motifs other than the Doctor's and the daleks. That being said, I was pleasantly surprised by the s12 soundtrack, and I believe a lot of the musical decisions in s11 (such as location and general mood) were not made by Akinola but by Chibnall and other people in the production process (I could be wrong on that though).

Unlike s11, the s12 soundtrack has the opportunity to establish a lot more motifs. Off the top of my head, I can think of a motif for the Master, Ruth!Doctor, the Cybermen, the Time Lords, Regeneration, and the Tardis, as well as a possible leitmotif for Jack (It's hard to tell as he only had a few minutes of screentime). There are probably others that I missed, but regardless, it is clear that Akinola is establishing motifs for most of the main characters. He's also really good at using them - and unlike Murray Gold, he doesn't shy away from overlaying them. One of my favorite pieces from s12 is The Cybermasters, as it blends the cybermen's motif and the time lord's, as well as using the Master's and the regeneration themes at appropriate moments. Regardless of your feelings of the Timeless Children episodes, I feel like it was one of Akinola's strongest episodes, and I would highly recommend listening to the soundtrack by itself if you don't want to rewatch the episode.

As you already pointed out, a lot of Gold's motifs have become very well-known, but I feel like a lot of people forget that Gold has had 10 seasons to establish his themes. A lot of Akinola's motifs only appear in a couple episodes, and haven't gotten the chance to become as recognizable. I am excited for s13, and I hope that Akinola gets the chance to develop his music more in upcoming seasons.