Does it make sense replacing all the different SHORADS types? Couldn't the Pantsir replace all of them?
There's a lot of reasons for why it's done that way. One of them is that they're slightly different systems. Another is powerful lobbies that want to make sure all the different projects, design bureaus, and factories, get orders. A third is that EW assets have a harder time dealing with an IADS that has many different types of systems operating on different frequencies.
The problem with this is higher costs, a literal zoo of different air defense systems, and of course many different chassis requiring different spare parts, trained mechanics, etc. If they can unify them at least in chassis it would be a big step forward. I'm of the opinion that the Strela-10 type can be eliminated entirely. Originally Shilka used radar, Strela-10 used IR. It made sense to have both. MANPADS provided the infantry with air defense means in a situation where other assets are unavailable. and of course Shilka was a gun system, Strela-10 was missile. But now as you right point out the Pantsyr has both missile and gun, radar and EO sensors. So it could replace the Strela-10 and Shilka/Tunguska. Leaving a next-gen MANPADS, and a brigade SAM (Morpheus) to replace the Tor/Osa. But I suspect lobbies, and desires of factories and KBs for orders will force the Sosna through anyway.
EDIT: An update on the staffing situation, the Russian Army has recruited 48 000 new contract soldiers this year so far, and total staffing is at 80.6% of proscribed. I.e. ~800 000 total. They're expected to get 7000 more before the end of the year. And they're continuing the policy of creating new units, a new SpetzNaz regiment, the 25th, was created in the North Caucus.
http://twower.livejournal.com/1117119.html
And a decision has been made on the AK-12. Deliveries will begin next year of both the 5.45 and 7.62 variants. New submachine guns, sniper rifles, and handguns are also planned. I suspect they're referring to the upgraded SVD variant, that's part of Ratnik.
http://lenta.ru/news/2013/09/17/newak/