You are trying to pin down a moving target and give a permanent symbol to a temporary slang name.
Yes.
It seems rather silly.
No, I don't think so.
The point is that by fixing a target now, that makes it easier for real-humans and existing software to work with the currency, for now (and a few years), that potentially helps immeasurably with bitcoin adoption and accommodation between now and then.
Right now, satoshis as 'base units' are fairly intrinsic to the protocol - yes, in theory, and undoubtedly eventually in practice as well, another n bits of divisibility can be added - but I understand that to be a non-trivial exercise. So the 'moving target' is not arbitrary for today and not tomorrow, and the question will need to be readdressed later - but 'later' will not be as critical to bitcoin emergence and adoption as 'now'.
[infact, if it was just for 'now' we'd all be talking mille-bitcoin]
Still you're point is valid - in the bigger picture, this is very much a tactical rather than strategic move.
And you know that if we go with
µB͈̎ people are going to call it you-bitcoin, and write it
uB͈̎ and that's just going to make me cringe and want to thump people...