In December, Alpha’s will be able to use T2 small/med guns. Doesn’t take too long to skill up for the small ones, and at 5mil per each, I’d prioritize it, lol. That leaves only the low fitting requirement as a practical concern.
The drop rates would stay the same when building of “meta” modules was introduced. CCP would simply replace the item in the current loot table, with a component needed to build the same item.
At some point further down, perhaps even simultaneously (best) “tier-a-cide” will rebalance these. Meta 4 could become the “compact” version, and the drop rates will be equal between all types, once “Meta”-scaled power levels go away.