Your variants aren't explained well enough to test, in my opinion. Each one brings up a lot of questions that need to be answered before one can play. As there are a lot more than I'd rather post now, I'll just list a few here:
Standard rules:
-Are these points scaled well? A 5+ player game in TSSSF is 11 points, and goes on for a long time. Don't you think points this high will cause extremely long games?
TSSSF Variant:
-So, this is a mode where both players play TSSSF with a grid? If the Mane character in the ccg works as a Start card, does that mean two different grids are happening at the same time?
-Are we both competing for the same set of Goals?
-Pony cards in the ccg don't have effects that work with TSSSF. Do they gain powers? If so, how would the game state track this if it isn't written on the cards? If not, how does the ccg player do anything besides play ponies?
-Pony cards in the ccg also don't have keywords. How would you address this?
CCG Variant:
-Does the TSSSF player draw a full hand of 10 Ponies in this mode? Are Goals used at all?
-Pony cards in TSSSF don't have effects that work with the ccg. Do they gain new effects? If so, how would the game state track this if it isn't written on the cards? If not, how does the TSSSF player do anything besides play ponies?
-How does the game state track colors of cards TSSSF Ponies are given if they are not written on the cards? Even if they are given colors, how does one know how much of each color each Pony has to contribute towards Goals?
-The list you give to assign colors to ponies does not cover all types of Ponies in TSSSF. Some of the ones listed are somewhat vague descriptions. While I can get what an apple family pony is, what constitutes a "food based pony" or a "fashion based pony"? Why are some Ponies assigned colors based on race, but others not?
-How does the TSSSF player play cards if TSSSF Ponies don't have an action cost?
Hybrid Variant:
-Does this mode have a play area like the ccg AND a grid like TSSSF? Do players choose to play from one section to the other?
-How do Troublemakers hinder TSSSF players? Are they assigned to Goals?
-How do powers that do happen to be able to interact with the other game work in this mode? For example, if a TSSSF Pony had a power that discarded another Pony, could it discard a ccg pony? How about a Troublemaker?
-If TSSSF and ccg powers work more effectively within their own game, what stops this from becoming two games of solitaire?
This is a rather ambitious project, and will need a much more comprehensive set of rules to function properly. Since you're combining both games into one, you can't really expect a ccg player to know how to play TSSSF, and vice versa. This would kind of call for a rules set that explains how both games work. Even if one does know how to play both games, you'd have to fully explain all the interactions between both games clearly so that there are no issues. Neither of these games were designed to mechanically function with each other, so you'd have a hard time making them work coherently with each other. As mentioned above, one of the main issues that comes up from this is the fact that powers and effects don't work with each others games. Also that ponies don't have certain mechanics like keywords or colors. Having a big list to consult of these things would be problematic, so it'd be hard to come up with a quick solution to this. Maybe posting some sort of "how to play" or gameplay video on Youtube would better help explain what you are going for more effectively than a string of gameplay posts on the forum.
Good luck with your project! If you happen to be at Bronycon I'd love to see how it's coming along in person!