As a future upgrade, I would love to see independent post boost vehicles for each RV like the Yars-M (so even in early midcourse, destroying one MIRV bus doesn't destroy all RVs) and extendable nozzle cones, if it hasn't been employed already.
The Agni-V Mk2 (Divyastra) is an advanced, MIRV capable iteration of the Agni-V.
Major improvements include replacement of maraging steel first stage casing with one manufactured using carbon composite filament winding, it is India's largest composite casing for now.
In this clip, we can see that the IRST housing has changed. It is now aligned with the centreline, and the unnecessary fairing from the older config is gone.
We had also seen this change in the renders shown in a recent show by AajTak.