Does it has a OFX plugin? So that Vegas Pro's background can be show in that editor and more integrated composite modes can be allpied directly in OFX, and sync text to the VEGAS merkers, Even we can use motion tracking transfer to control its position parameter.
No OFX plug-in that's up to the developers of Vegas. I have to come back to that OFX for a moment. I mean it's up to the developers to integrate Blufftitler into Vegas (THX Dexcon )
Basically, that's not correct. NLEs such as Vegas Pro, HitFilm Pro, Resolve and so on have the OFX open source standard on board so that plugins also coded to the OFX standard can be recognised by those OFX compliant NLEs. Please see the Wikipedia page about OFX:
It allows plug-ins written to the standard to work on any application that supports the standard.
As Vegas Pro supports the OFX standard, it is in fact up to Blufftitler to release a version of its product that meets the OFX standard in the same way as has done BorisFX, NewBlueFX, HitFilm Ignite Pro, etc.
Bluff has been around for many years. I've yet seen them make the product as a plugin for a NLE. I think that if they did, they would have increased sales in addition to having the standalone version. But I guess they know the cost of making it a plugin verses maintaining the standalone version.