Have you considered an external sequencer? I have an Oxi One mk1 which I'm extremely happy with ^_^

Also, I think you should consider some modulation sources, like LFOs. Pam's Pro, which is part of @noodle_hut setup, is a great utility for this.

You might also be interested to look into low pass gates (I'm personally a fan of LxD here) to combine with the various audio outputs from your Mother-32 and Labyrinth, and might even a submixer to combine multiple audio signals together (I have the A-135-2 for my Mother-32).

That said, you're on a great start, starting with semi modular synths are a great way to get into Eurorack, and with the pedals as effects you should have a lot of options audio-wise ^_^