If we qualify for the CL this season and the building work (on the stadium) begins in earnest as planned this summer, I suppose I see having Modric and Bale as a potential bridge between now and occupying that new stadium - at which point the club will generate enough income to legitimately expect to have players like Modric and Bale. And fwiw, it's not really about seating capacity, it's all about huge corp.ent.
But if we don't qualify this year, one or both will be gone and the club will find itself on a very different CL trajectory, one that relies on income from the new stadium to build a squad again - in other words all that good stuff moves several years, or a decade, down the road. There's a decent chance we can have that now, if we get this Premiership season right. The FA Cup doesn't help us do that. IMO.
/Eeyore