Leicester are an interesting one, their lack of European football gives them a significant advantage in some respects. Liverpool, Newcastle, have also managed to trouble the top 4 in seasons when most around them had Europe and they didnt. The usual pattern is however these teams start to falter in the new year and fall away toward the end. It would be a shame if Leicester now failed to grab a champions league place....and if they do watch them struggle next season.
As for Arsenal and City all things even I would take us to pick more points up than them between now and May, the extra cup games we have compared to them could be to their advantage especially if they go out of the CL in the next round as seems likely....and we progress as also seems likely.