For Manchester city;
I wasn't surprised because Manchester city has missed the EPL title, but they will not miss the EPL top 4.
For Arsenal;
Draw was a good result for them. They have strong meeting in the midweek, so they don't need to give their all this time. Have you not heard that Real Madrid wanted their match to come earlier to give them time to rest against Arsenal match.
You sounded very sure that Manchester city won't be missing out in the top 4, I think they may miss out unless chelsea decide to messed things up for themselves, ordinarily Chelsea is supposed to win Ipswich town today in other to balance back in that 4th position, so I see Manchester city current league position as a temporal one , though I must say they did absolutely great in their match yesterday, winning Crystal Palace from behind is what I called a very deserving winning by Manchester city, pep reaction when Crystal place scored there first goal was very sympathetic to me, the man was very devasted at that moment, I was very happy to see City turn things around very quick, 5:2 victory isn't just regular but a remarkable one as such.
Arsenal match ending as a draw in their match with Brentford yesterday isn't something I like but in football we should accept some results because of things ahead, arsenal has a fight to finish against Realmadrid but I don't see Realmadrid being able to turn things around in that match, arsenal was a better team when they met last week and I don't see thing changing in this particular match too.