Does India actually have the infrastructure to restrict water to Pakistan? It should require massive amounts of water capacity through dams, right?
Such dams on the rivers that Pakistan relies upon would be massive construction projects past the dams themselves (to channel that water). Its impossible to do economically to begin with....you have to cleave through some big mountains to do it. So diversion is impossible.
Having storage capacity dams, again its very bad land use for same reason (the geography upstream).... and would just be out of spite given local population is low compared to downstream Pakistan. It would be untenable conflict point and there would be plenty of advance warning to Pakistan its coming given the time to build such a dam.
India makes full use of the Ravi, Sutlej and Beas river as these both have geography apt for diversion and pondage retention.
That is why/how IWT was negotiated on physical realities and constraints (i.e why Ravi and Beas were given entirely to India to compensate for what is not feasible on the others compared to where Pakistan can feasibly tap those water resource more optimally)....so the basic contours of that will not change.
Abeyance is also a suspension not a scrapping, it can be restored after some time. We will have to wait and see what other responses occur in this tension window.