I would push to get 1:1 for time. This is 100% on Meraki, not you, so in co-term you should not take a hit at all. Licensing team will regen the license for 1:1 (or should) so you don't lose anything from it.
I am in PDL so they didnt have a choice to but give me the full time, but I dont see why they wouldn't in co-term either.