Jack of all trades, master of none... not so capable (in equipment and performances) as a true interdictor, neither not so cheap and simple for COIN...
It very much is (or at least has been developed as) a jack of all trades. Recherche is rich enough to afford an aircraft of this capability but not rich enough to afford (or doesn't have a pressing need for) multiple specialised platforms. If a more capable interdictor is needed then there is the strike version of the Tempest, and COIN isn't really high enough priority for Recherche to have a platform just for that alone (rather than a more multi-purpose platform like the Halestorm).
Regarding the radar, I included one for similar reasons to the Ka-52 (and I guess also the Longbow Apache but nose-mounted) and initially with some terrain following ability (that could now be provided by a separate pod mounted system if it's required at all). As the design progressed GMTI and SAR (basically similar setups to UAVs like the MQ-9 Reaper) became more of a focus. I'll have a look at Blackbuck's suggestions and have a think about options.
Nice design, but I agree with concerns about landing gear - after all for a rough field aircraft with propellers you want as much clearance as possible.
I'll look at moving the sensor suite back a bit, just have to make sure it doesn't then impact the centreline hardpoint
A dedicated variant for tactical ELINT/SIGINT/photo-recon along the lines of the OV-1D Mohawk might prove viable.
That's definitely a possibility I can look in to.
EDIT: What about the Seaspray family of radars?