I don't think Russian army will take tracked Pantsir as they already have Tor-M2. Pantsir is SHORAD, the same as Tor, while Tunguska is VSHORAD with guns.
They used Tunguska and TOR together.... essentially TOR replaced OSA which replace S-60 57mm cannons, while Tunguska replaced Shilka and SA-13 and SA-9.
Their air defence regiments within there armoured divisions includes missile (TOR) and gun/missile (Tunguska) regiments and I don't see that changing.
I don't agree that they don't need the full 40+km range Pantsir missiles... the west is adopting 32km range ATGMs and while the odds on hitting a vehicle or helicopter launching missiles from that distance is low the ability to detect and engage such incoming missiles and having a chance of shooting down the launch platform makes them worth considering.
Of course as most of these new missiles are IIR and optically guided some form of DIRCMS systems would also be of value too.
Tunguska will stay in armament for some time as it is equipped with own search radar, while Derivatsia and Sosna don't have it and are depending on battery radar and IADS for target deliveries.
There are still Shilka and Osa in operation... a Tunguska, as you point out has radar, which would make the 2S38 and Pine more effective...
Maybe army could buy wheeled Pantsir on Bumerang vehicles to have potent SHORAD with guns to protect logistics behind the lines. Bumerang is stable enough to effectively use guns on the move.
It gives them a protected mobile chassis that should be relatively cheap to buy and operate and produce in numbers... paired with another boomerang with a 2S38 turret and it would be quite a powerful and potent team... would be an effective anti ambush pairing too...
Also we saw in Syria SHORADS are easy to destroy and their counter jamming capabilities are very limited
I would say the opposite... In Syria where individual vehicles were used to defend targets over quite a time period the Israelis might have taken out 2 Pantsirs that were overwhelmed and ran out of missiles.... but otherwise even before a unified IADS the Pantsirs and BUKs seemed to have a rather good kill rate against a range of targets.
In Russian use I really don't think even against HATO that the enemy would be much stronger than Israel... and they will be properly equipped with large numbers of systems all working together...
Tor-M2 and Pantsir have the same capabilities, so no need for Pantsir.
Enemy helicopters and CAS aircraft and drones means extra range for missiles would be valuable for Tunguska.