With all due respect, building a party around the principle of "consideration and consensus" appears terribly shallow. See the example of the Senate - "consideration and consensus" are very widespread among nearly all Senators, regardless of their partisan affiliation. Most bills are extremely left-wing, yes, but there are usually lengthy debates full of consideration and consensus-building.
If the coherent message of the People's Party is supposed to be something that 90% of Atlasia's citizens can subscribe to, fair enough.
It's harder to subscribe to that message than you would think. The senate is very isolated from Atlasia's other political arenas. Outside of the senate, tone matters. The tone that the Federalists telegraph is incompetence and nutjobbery, and the tone that the Laborites exude is unabashed extremism. TPP manages to rally around a set of policy points as well as a positive attitude/tone. It's something to be proud of, to be sure.