It doesn't seems to have improven much...
If it doesn't work, for how long would it continue?
It reminds a bit of 97/98 season when Svennis brought in ManKo from Samp and tried three forwards (Manko playing a little behind two)with Signori, Casiraghi, R. Mancini, Boksic. Formation was not the only problem beetween Beppe (our top star until the season before) & Svennis, but Beppe eventually had to go in the middle of the season (strangly to Samp).
With the three all included I think it would be better to have Pandev & Zarate both play a little behind Rocchi (leaving Rocchi as a lone striker) with a midfield with Ledesma and put two defensive midfielder, so called X-Mas Tree formation.
That of course will requier Pandeve & Zarate work more on the upper midfield, which if both have to comes to a doubt.
I would personally prefer to choose two among them plus one comming of the bench and have 4 midfielders including Foggia playing more continuously.
It may sound a bit cruel, but I would start PA-RO-ZA until end of this month and drop one to the bench after the transfer deadline to lock them up for the rest of the season.