The game … probably wouldn't require any special house rule since it's only tiles from the base game.
I think it depends a lot on how your group tends to play. With base game tiles only, there are 7 edge combinations missing, so trapping a meeple in a feature that can never be completed is pretty easy. When you play with I&C and T&B, you are only missing CFFR, so trapping is quite a bit harder. If your group naturally avoids traps (“plays nice”), this might not be a problem. But with players who try to trap opponents’ meeples, a game with 3X base games but still only 7 meeples might tend to an unpleasant meeple shortage late in the game.
Players can of course adjust their strategies, but if you have Das Fest (10th Anniversary), you could add one or more copies of those 10 tiles, which leave only CCRF, CCFR, CRCF combinations missing, and of course allow you to escape when trapped.
Since you seem amenable to house rules, you could also keep just base game tiles and allow the “meeple removal” mechanic whenever a player places a tile with a pennant but doesn’t place a meeple.
Or (shameless self-promotion), you could try my
“Gates and Walls” expansion, which helps players avoid trapped meeples with a simple new mechanic.
I hope you’ll share more photos!