An Eretz Yisrael fellow in Chu”l–If you go after today, continue saying v’sen tal u’mottohr in the birkas hashanim..try to avoid being the shali’ach tzibbur; if you end up being the shali’ach tzibbur, you should daven the way the tzibbur is saying.
If you have been there from before today, say it while there in shema koleinu, till you get back here. After that, say it in the regular place.
Chu”l person here–If he is here already now, or will be coming, and he is staying till Dec 4, he should say it like we do here.
If he is leaving before Dec 4, he says it in shema koleinu.
After an edifying session at the Oneg last leil Shabbos, where the subject of talking in Shul was fleshed out over delicious cholent, Rav Malinowitz feels a certain consensus was reached, and there is no need to address the matter publicly–at this point. There will be steps taken in the coming days iyh to make the davening atmosphere in the Shul even better than it is.