Agree totally. That is the more obvious and directly illegal grounds for tossing ballots. But those illegal "guidances" and the SOS flaunting state law requirements can turn an election when you're talking about a 1% vote differential.

Yes, the suit is based on equal protection and due process.

(133) Philadelphia County, however, had other plans. As reflected in a document titled “Cancelled Ballot Notification Information,” Philadelphia County sent a “notification” to voters whose “ballot was cancelled” because, among other reasons, the ballot “was returned without a signature on the declaration envelope” or “was determined to lack a secrecy envelope.” Philadelphia County allowed those voters to cure this defect by casting a “provisional ballot on Election Day” or requesting “a replacement ballot at a satellite election office.” Philadelphia City Comm’rs, Cancelled Ballot Notification Information, bit.ly/3la08LR (last visited Nov. 7, 2020).

(136) While counties like the Defendant County Boards of Elections permitted voters to cast either replacement absentee and mail-in ballots before Election Day or provisional ballots on Election Day in order to cure their defective mail-in ballots, many more counties are not. Lancaster, York, Westmoreland and Berks Counties, for example, did not contact voters who submitted defective ballots or give them an opportunity to cure. They simply followed the law and treated these ballots as invalid and refused to count them.

(137) Because the counties that followed state law and did not provide a cure process are heavily Republican (and counties that violated state law and did provide a cure process are heavily Democratic), Defendants’ conduct harmed the Trump Campaign. It deprived the President of lawful votes and awarded his opponent withunlawful votes.