Looking only on export is not possible, since the forces have important requirements as well and there must be cost-effective indigenous solutions too, be it LCA or an AMCA, just not both. From todays point of view on threat perceptions and the future potential of LCA beyond 2020, AMCA instead of LCA would make sense, but for the industrial growth LCA is simply too important to not finish it. Not to mention that ADA/DRDO maybe even HAL doesn't really look on commonality, rather than to develop everything on their own and that will delay any AMCA project too.
So all in all, LCA remains to be important, but exports are important and that requires better marketing!