Yes, create a new rule, enter the query IsVia (or nowadays, select object type from the drop list, etc.), and set to direct.
If you have a habit of using vias as test points, you may want to add thermals back, in which case sort further based on hole size or TestpointAssy or whatever. Or use free pads instead of vias, or do both (use free pads AND set rules on them), etc..
(Free pads can be found by (IsPad AND (Name LIKE 'Free-*')), yes, the name is automatically prepended like that and they don't really tell you this anywhere.)
Or similarly for planes, but I would recommend against planes, they've been kind of deprecated for a long time now. You sometimes still need to use them, but for the most part polygons are better. (Maybe they've been optimized more in recent versions, I haven't checked, I just never use planes.)
And yeah, polygons need to be repoured. You can set automatic repour on modify in options. That can be a bad idea on larger designs though, so YMMV.
Tim