It would be very hard to outgrow backgammon for 2 main reasons:

1) Board is too big / Game is too long. Some people will play fewer games since it takes longer to complete. If for example there were 6x6 or 8x8 versions of the game (would have to think more about what would be best) - but with a 12x12 board - it will lose some players.

2) Backgammon is a classic popular games which many knows how to play. Froglet is a new unheard of game which only some players will try (and if they don't catch on, may quit before playing any more games.)

BUT Froglet will get the type of people who like the "outbreak" type games on that other GT game site, so that is a plus.