The way I read the OP is to have the same potion provide mixed stats, like both major sorcery and major brutality. I've looked into this myself too, now that I'm starting to run some "hybrid" skills (stam on a mag toon and vice versa), and agree it would be nice, though I know in the past when ZoS has introduced new ingredients they have been very expensive on the player market and sometimes also acted as a food ingredient to further drive up the cost. And having the same potion provide all four buffs wouldn't work in the current alchemy system, which only allows three effects max. Still, I would like to see hybridized potions added to the game and believe it's on the table with the way current changes are going.
Also, as it's related, I've been wishing for some new hybridized foods. Currently, there are foods and drinks that provide increase to max stam + mag, or to one and then recovery for the other. Then there are also a couple of foods that provide tri stat with health recovery. I wish there could be new purple or gold food that gave bi (or tri, but I know that's too generous) stat plus recovery for stam or mag rather than health.