[Rathar]

Traditional yes, Mandatory no.

Treaties often do get reconfirmed due to the strategic realities of a games situation but if a new player changes direction people will think it a bit cheesy but nowhere near as cheesy as if the old player broke treaties in the same manner.

I posit that this is because we expect new players to be well, different.

And yeah, man does it suck to have your "Trusted" ally go poof.