I don't know that this would have a negative impact on mid tier crafters like me (have 3 crafting Lucis, moderately wealthy, mostly only craft in 1 or 2 markets) and I believe there's many of us. Additionally, I think it may encourage lower end crafters who don't want to challenge the kingpins. Sure some of them will level alts to corner all markets but a lot of them will be dissuaded. This could make it easier for players like me and lower who aren't quite as hardcore to compete in the market. As long as the base items used to craft the specialization items are still craftable without being specialized, I don't think it goes against the spirit of the armoury system.