Some interesting fixtures:
Bayern: 3 April Leipzig, 6/7 April CL gf , 13/14 April CL qf, 17 April Wolfsburg, 21 April Leverkusen, 27/28 April CL SF. Bayern certainly have tougher fixtures than Dortmund in April, in May it's the other way round.
ManCity 3 April Leicester, 6/7 April CL qf, 10 April Leeds, 13/14 CL qf, 17 April Aaston Villa, 25 April Tottenham LC, 27/28 CL sf, 8 May Chelsea. Will need that squad depth. Could have a FA cup SF in 17 April
PSG: 3 April Lille (title decider?), 6/7 April CL qf, other league matches aren't that bad even if PSG rest some players. French cup QFs will be played on 21 April, but odds are PSG get an easy opponent. Certainly one of the easiest schedules for PSG compared to other CL teams left.
Real Madrid: 6/7 April CL qf, 11 April Barcelona, 13/14 CL qf. Very tough time for them around QF's, should they progress, it gets easier in May. Of course by then a lot depends if they still have a shot at the title. If not, they could heavily prioritize CL.
Chelsea: Prior to 24 April against West Ham, nothing too difficult. Depending on the draw, I quite fancy them getting through into the semis. Could have a FA cup SF in 17 April
Liverpool: 4 April : Arsenal , 6/7 April CL qf, 10 April AV, 13/14 CL qf. Tough two weeks.