i had my warmoth strat plekked a few years ago. played like a dream. neck was fully finished / coated by warmoth's lacquer.
i scalloped it earlier this year and left the wood raw. all the fret heights changed as the neck absorbed environmental humidity.... so the plek work went out the window! warmoth's sight says all their maple necks/boards should be finished to prevent warping. but i've heard different from other people about the necessity of finishing....
so, i'm getting it re-plekked.... why not..... since it's scalloped, i have plenty of height to work the frets down.
should I get it lacquered? or in theory, is it done absorbing humidity and 'settled'? when winter comes and the air dries, can i expect the wood to shrink uniformly?
I have nothing against finishing it.... it's just the extra work i want to avoid but if it throws my plek money out the door, i better finish it.
I'd err on the side of finishing it. Some necks are more stable than others.