Roman v Rusev, Charlotte v Sasha and the title match all deserve the cell in a way. I can get on board with it.
How do they deserve the cell? Roman vs. Rusev I can make a case for, but the Cell used to be done to end blood feuds. Now they're put in there because of the date on the calendar.
Ever since this stupid show became a gimmick PPV, these matches have happened inside the Cell:
Undertaker vs. CM Punk
John Cena vs. Randy Orton
DX vs. Legacy
Randy Orton vs. Sheamus
Undertaker vs. Kane
Randy Orton vs. Mark Henry
John Cena vs. CM Punk vs. Alberto Del Rio
CM Punk vs. Ryback
CM Punk vs. Ryback & Paul Heyman
Randy Orton vs. Daniel Bryan
Randy Orton vs. John Cena
Dean Ambrose vs. Seth Rollins
Roman Reigns vs. Bray Wyatt
The Undertaker vs. Brock Lesnar
Roman Reigns vs. Rusev
Charlotte vs. Sasha Banks
Kevin Owens vs. Seth Rollins (vs. Chris Jericho)
Of those, only Ambrose vs. Rollins, Taker vs. Lesnar and Reigns vs. Wyatt have absolutely deserved a Cell. Reigns vs. Rusev can make a case for it.