The only risk of not closing is freeze damage. To avoid freeze damage your pump (most) has "freeze protection". If the temp falls below 34 it will turn on the pump to keep the water circulating. My pool was finished late in the season too but we actually got around a month to swim. Even then when I closed and had the water level lowered, I could (still can) see a ring on the pool where that initial lowering was. Faint, but there. I am actually not sure how long new plaster needs to have full water level to avoid a ring. You also are not supposed to run your heater for 30 days after new plaster due to plaster dust damaging the heat exchanger. So even if you are plastered you will not be able to swim your water will be way too cold. Same goes for the SWG (30 day wait to add salt) so you'll have to manually chlorinate until the water temp is below 60. Not to mention you need to brush 2x a day or so for at least 2 weeks.I have been trying to schedule plaster since a month now with no success so I really dont want to wait until spring for this because they are unreliable and I want to get rid of them already.. I also want the pool ready for my daughter's birthday on May 21st. At this point I dont care if I dont go into the pool this season anymore, would there be any risk in closing in November?
A&S should know if they are too late to plaster. My neighbor's A&S pool was pushed to the following year due to this reason. If they do it right now they are ok but if it gets to be much longer they will probably push it until next year. Have you tried A&S corporate and bypass your rep?