Yes, both Monsieur Paul and Takumi Tei suffer from what makes them unique as premium dining experiences in a theme park. With the amount of money commanded for premium dining at $195, $250, and $295 for Monsieur Paul, Takumi Tei, and V&A's, I suspect that most people don't want to roll in straight from a day in the parks but want to freshen up, and theme park dining is a disadvantage for this. I think even if V&A's was considered an equal experience that it would still be more popular exactly because it's in a resort and not a theme park. It's much easier to get to V&A's and make the short walk from monorail or porte cochere if driving or ride sharing over. Two weeks ago I made about the shortest trip one could from Boardwalk to Monsieur Paul and it felt like a real commitment to walk over in the heat/humidity, tap into the park, and walk a short distance from the International Gateway, so I imagine it's worse for anyone coming from the front of the park or first needing to get to Beach Club or Boardwalk before even beginning to walk into EPCOT. And then at these prices, paying $295 for V&A's feels like a modest up charge for a better experience that's more accessible.
Having been to both Takumi Tei and Monsieur Paul this year with neither being very busy, it wouldn't surprise me if they're cannibalizing one another. While very different experiences they're like cannibalizing each other for whatever is left behind of folks not snagging V&A's reservations. And, again at comparative prices and experiences, many not getting a V&A reservation are going to put off premium dining until another trip. A price increase at V&A might help push some to Monsieur Paul and Takumi Tei.