Tomato support for Newer Asus Router (broadcom)

I know AC3200 (dual core 1GHz) is supported with Tomato, huge thx to Shibby.
But how about with faster CPU? Like AC3100 (dual 1.4GHz) and AC86U (dual 1.8GHz)?

If BCM4709A0 (AC3200) was implemented successfully into Tomato, why
BCM4709C0 (AC3100) isn't been implemented (ATM) into tomato?
We can forget BCM4906 (AC86U) ATM, should we focus on BCM4709C0 (AC3100)?

Please enlighten us the obstacle(s) to implement BCM4709C0 into Tomato.
Is it wl driver?
So...

Tomato support for Newer Asus Router (broadcom)