Trudeau's policies were actually a shift left, which is part of why the supply-and-confidence agreement is going so well - there's real overlap with the NDP now.

Moving back right either economically or socially seems tricky. Few voters are excited about reduced social spending, and moving right socially would really anger a lot of the Liberal base. If the change of direction was a stronger defense policy I guess I could get behind that.

The current Liberals are economically blue compared to what? They're literally implementing NDP policies right now, and the Greens have one seat. Is this a communist thing? Nobody's voting communist.

Similarly, nobody except the right wing of the Conservative party thinks any of those three things are good. Disagreements from the center leftwards are just about how aggressively to beat down those old demons, and at what price.