Very correct sir, especially on the SPG/H front. The IA has no real SPG/H capability to speak of (the FH77 does NOT count). For too long the ghost of Bofors has haunted the IA and namely MoD/GoI into inaction on the arty front. It has only been in the last 1-2 years anything in this respect has begun to change.
For sure by 2017-22, the IA will come out victoious. Between now and that time the IA is planning to spend in excess of $5 BN USD purely on ~3,000 arty pieces of all types (ULH, SPG/H, towed etc).
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Badbadman the M-777 ULH purchase is one,tiny, facet of the arty modernization/expansion program and anyway is being procured specifically for the new Mountain Divisions the IA is setting up. This weapon will have almost zero baring on the IA-PA equation.
Having said that, on the MBRL front (which is classified as arty) the IA is streaks ahead of the PA and (possibly) even the PLA. The PINKA (not being upgraded to MK.2 standard) and SMERCH are a lethal combo the IA has in its possession and in ever growing numbers.