Only 1.2 overs were bowled and the game was stopped then. The filed wasn't suitable for playing. The first session of day 3 is wasted. The match is continued now, but we shouldn't expect anything else than a draw from this point. And I agree with you. A reserve day will be helpful in these cases. ICC should implement the reserve day for each test game like they used it in WTC final match. It was effective too.
There is no need for a reserve day. The delay here was not caused as a result of rain. The delay was resulted from the inability of the ground staff to keep the ground properly covered. And this has occurred on a regular basis in the West Indies, although it is almost unheard in any other country. The ICC should take note of this and issue a warning to the WICB. I feel bad for the Pakistani batsmen, as they were in a good position. If play gets delayed further, then in all probability this test will end in a draw.
The condition WICB is in, I really don't expect that they will care about these petty issues, even ICC knows the condition of WICB, so they won't issue any warnings to them and the way how new countries aren't interested in cricket I am sure ICC don't want to remove another test playing nation from the list. A warning obviously must be there for formality but I don't think it'll change a lot of things.
By the way, after the session is wasted I think Pakistan lost their momentum completely and the result of that is in front of us after the collapse of top order even the lower order collapsed quickly, Fawad Alam is batting like a one-man army. But let's see how far can he take the team.