I couldn't care what an insecure few on this forum think. The whole point of these platforms is to express your opinions, not take orders from General Consensus; if you think our team and transfer policy are faultless and without potential for improvement then good luck to you, but you have to accept that other people think otherwise and will propose ways in which to improve them.
None of our current centre halves are up to the standard set by Chelsea; the pre-Pellegrini Kompany was, but his current form simply hasn't been good enough. Demichelis has cost us more goals with individual errors in 2 seasons than Lescott did in 5, and Mangala's first season wasn't anywhere near as good as Nastasic's, despite the Serb experiencing all the same mitigating circumstances that people use to excuse Mangala's mistakes.
Kompany can come again, but it's essential that we find him an intelligent partner to establish the kind of familiarity and stability that allowed him to previously prosper. Mangala and Demichelis go AWOL far to often to fit that description, and Ramos would be the same. There's a 21 year old defender at Everton who was the best on the pitch against us, the Rags and Chelsea who ticks every box, but it looks like the latter will sign him and groom him alongside John Terry with a view to succeeding him.
Stones and a proper midfield anchor should have been our primary targets this summer, as an improved defence with a resurrected Kompany would take us closer to Chelsea next season than any marquee 'Golactico' signing can. Hopefully we have a few targets that have gone under the radar because if not our potential attacking brilliance next season will be neutralised by defensive ineptitude.
Mascherano still regards himself as a defensive midfielder despite being used almost exclusively in defence by Barca in the past 5 years; a chance to play there for the remainder of his career, alongside international teammates in a league he's already excelled in might just appeal to him.