Yep. You need software that supports rule based definition of thermal reliefs, rather than one generic one for a pour/plane and all the components on it. I.e. with 2 Oz copper you can set 0402's to have a 6 mil wide connection, 0805s can have wider, MOSFETs that youre trying to sink the the plane can be no relief. The copper pour gets generated appropriately and no having muck around with manually adding traces.