I can't say no to certain buffs to that ship, as it does feel a bit on weaker side compared to big three. I do not agree with mass decrease, however. What I would do is just buff hull strength, and let it have shield near max value possible ~9k MJ preferably or even more, and maybe even further incease the mass of the ship, while cut on speed a bit more.
But overall, Type-10 is absolutely solid for most PVE content. If you enjoy piloting it, there are no activities you should have any issues with, especially engineered. We just have to accept that very microscopic number of ships can be viable for things like PVP or AX Combat, where metas are extremely tight and rather dumbed down, and it will never change.
Personally I actively pilot T9 (non-combat only), and enjoying it quite a lot, can't really ask for any buffs to it.