My hot take is that I don't think tera Eleki is going to be all that good. Sure it gets stab boltbeam, but with the number of good grounds in the tier (Tusk, treads, chomp, clodsire, ting lu, and eventually usaluna & lando) it's going to have to tera every game to be consistent. And unlike Dragonite, which loses a quad weakness, has multiscale, espeed and a gains a reasonable defensive typing, Eleki gains a bunch of weaknesses by using tera ice. With how frail it is, it'll also could be caught off guard and eliminated with a tera ground. Aside from this, almost all of the home pokemon people think will be broken with tera will be broken without it IMO. Fighting tera magearna won't be fun because fighting magearna isn't fun.