Frankly I don't think there is a good way to remove T2 BPOs. I would expect more additive solutions like the aforementioned boosts to invention ME bringing invention up. The ultimate additive solution would be to let inventors earn new T2 BPOs in a limited way that doesn't render invention irrelevant, finally allowing the current generation of players to earn what some consider to be the ultimate solo manufacturing content without having to pay out the nose.

That would be my ideal solution anyway. I suppose what I'm getting at is that the existence of BPOs is not inherently the problem, the problem is the existence of the BPOs without any way for players to acquire them from the environment. It is my hope that CCP has or will consider some kind of solution fixing this aspect and appropriately balancing the BPOs with invention instead of acquiescing to the rabid clamoring for their outright removal.

In reality we'll probably see a research/invention revamp in the future that both makes invention less annoying, and puts it on even more equal footing with BPO production, continual changes, adjustments to BPOs, gradually bringing the value down, I doubt we'll ever see full removal though. It's not like the mere existence of BPOs is some horrible public blight standing in between inventors and incredible profitability.

Yeesh though, the inventors clamoring to kill BPOs to get into the ~promised lands~ of BPO-dominated markets are going to be sorely disappointed if BPOs ever do get straight up removed. The reason the markets are BPO-dominated, from what I've seen, is because of a severe lack of demand.

E: Perhaps the ultimate solution is to balance T2 BPO production with Inventing so well that the literal only advantage of BPOs is not having to invent. :v The BPOs would be the reward for the long-term inventor's pain and suffering.