Part of the reason construction took this long was that the steel was originally planned to be procured from abroad. But that didn't work out, for several reasons. Ultimately they commissioned DMRL to come up with a warship grade steel, and the PSU plants successfully managed to produce it. This steel went into the Vikrant, and also into the P15A/P15B destroyers, P17 frigates and P28 corvettes. In the process they shaved off about Rs.1500crore off the cost, compared to the original price of imported steel, but at the cost of the additional time.
The island and sections of the angled deck have already been seen in pictures elsewhere. They need to be installed after this float out. CSL doesn't have the luxury of letting this hull occupy the drydock continuously - it's better to install those off dock, now that the basic hull is complete.
Keep in mind this is a pretty big carrier for a first local effort - it's larger than anything the RN
has had built, except for the QE2 class under construction, for example.
Progress on this ship has been pretty good - there's quite significant progress since the pics from last year, and in a year both the angled deck and island might be in place, for a more complete look. The next hurdle is likely to be sensor and comm integration. The P15A ships are delayed for this reason - the ships are largely complete, but the collaborative weapons suite development (with Israel ?) is not.