What I have culled from several dozen decent twitter accounts from across the spectrum:
US, UK & France not expected to wait for further UN process. Potential targets have already mostly been emptied of Syrian troops.
Strike possible tonight. Syrians think it will come From Jordan and Turkey, not the mediterranean.
Russia expected to shoot down a few missiles but mostly stand by. Putin called Netanyahu today and threatened direct Iranian retaliation if Israel gets involved.
Russian perspective is this is has nothing to do with chemicals and everything to do with ejection of Saudi backed jihadist forces in Ghouta who were the largest remaining major threat to Assad.
The more successful EU/US are in destroying Syrian army, the more of a vacuum created for Iran to step into militarily.
Russia willing to accept a day or two of shooting, if it goes on any longer we're looking at dangerous escalation.
Of course, any shooting holds potential for disastrous miscalculation.
Serious political ramifications possible in UK/US, especially for May. Its conspiracist, but I cant help but tentatively correlate the serious escalation in efforts to unseat Trump via the Cohen raid with goings on in Syria.