Why not be able to utilize the transwarp network for transporting?
We'll see I guess. I don't think it follows that if you master transwarp drive or slipstream drive you'll get transwarp beaming cracked automatically. But who can say? Maybe they will have it all. There are some pretty funky looking gateway-style transporter arches shown in the trailer behind Picard at one point. Maybe they are transwarp beamers.