Read Ohio's filing carefully: they're being completely lukewarm and it could even be interpreted that their position undermines the case of Texas, the President, and the other Intervening States.
Put in plain English, Ohio basically said:
"This election was really confusing, controversial, most likely unconstitutional and clear as mud. BUT, it's too late to do anything about THIS election, we guess... Oh well! #BuildBackBetter
However, if SCOTUS could rule on whether Governor's and other State Officials are allowed to change election rules with impunity mere months, weeks, DAYS before an election, without Legislative action, OR NOT, that would be swell!
After all, that behavior probably subverted the will of the electorate in THIS election. Gosh, that sucks! Let's make sure NEXT TIME it doesn't happen, k?"
I personally would hold off on feeling excitement about Ohio jumping into the fray here. Their filing smells extremely cucky and suspect to me.
I am SO disappointed