I don't think that the CRTC would go after Mascon unless they received a complaint. As a small company, they probably don't have the expertise to properly review the CRTC policies. If they decided to introduce a CRTC Skinny Basic, it would probably be at the same price, since the cost of Stingray is quite small and I think TSC is either free or perhaps they even pay cable operators to carry it.
As a point of reference, the entire cost of the mandatory specialty channels is under $1.50/month. It varies slightly because there are different channels for English and French areas.
I looked up the Copyright Board fee and it is 98 cents per month which covers all distant TV channels. The U.S. commercial channels get less than 1 cent of that through BBI.
EDIT: Less than 10 cents goes to CRRA which administers retransmission royalties for programs owned by broadcasters: CBC/SRC, Télé-Québec, ABC, CBS, and NBC.
The rest of the cost of Skinny Basic goes to build and maintain the cable network, back office operations, customer support, etc.
It will depend on Shaw. They will probably keep the theme packs and implement full pick and pay in December, although they may have to make the theme packs smaller. Shaw will have to allow an add-on or add-ons for Stingray and the other channels that aren't in Skinny Basic, since the CRTC rules say that Skinny Basic subscribers must be able to add any additional channels.