The Warden's main / primary function is to direct blast forward. ... and away from you and others by your sides. ( Think close quarters / vehicle interiors )
You will need a quality Flash Hider to control ( without the Warden installed ) muzzle flash.
The Warden will "amplify" muzzle signature in many videos I have seen. ( Still waiting to fire mine at night. )
As far a s POI change... you will see some, anytime you add weight to the end of a barrel. be it a .. suppressor, Warden, different muzzle device, etc... ( changes barrel harmonics ) ... but, IMHO the Warden isn't intended for long range precision shooting use.... again, it is meant for up close shooting"
And even if you wanted to use it for LRPS... you'd just account for the changes.
That said... the Warden is a snug fitting device, and that is important to precision ( accuracy ).
The Gen I Lantac BMD's I bought were a loose/ sloppy fit... and my precision with it installed was dismal from known accurate barrels.
Those Lantac Gen I BMD's have since been regulated to close quarter firearms... where long range shooting is not a priority.
The Wardens attached fit is far, far better then the Lantac BMD Gen I ( FWIW, I have a Gen II Lantac BMD on order... and it appears to be a far better connection design...still using the many BMD collars I have installed.... we will see. )
FWIW, I also have the Griffin Armament
QD Blast Shield ( Gen 2 ) in use... those will fit a lot of other muzzle devices. BUT... not all , so you would need to try them on a specific muzzle device prior to use to assure proper complete lock up. ( Complicated matter
, I have another write up else where. )
And am also trying the Ferfrans 308 device.