You guys might almost get your wish, according to the reddit leak, Titanfall 3 will be a much meatier package singleplayer-wise.
Hope it doesn't launch with less multiplayer maps than Titanfall 2, though, 'cause the singleplayer in the sequel is what got them to lower the amount of maps at launch compared to Titanfall 1 (9 maps for TF2 and 15 for TF1).
I hope this is true because it is very deserving of a new game. They just did such a fantastic job implementing the single player and the evolution of the multiplayer was excellent.