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Well Neymar isn't that useful players in terms of consistency. The risk of recruiting him is higher than benefits especially if we take on consideration his salary.
Until now there is rumours about Manchester United, Chelsea and Newcastle also. Pep Guardiola was reported that he talked with him but I doubt he will join Manchester City personally. I find him annoying and childish for Manchester City.
Yes, the problem is also there, the discrepancy between the salary paid and the expected performance. Maybe if it was then, Neymar might be able to develop quickly, but for now, it's a bit doubtful if you see how he performed during his time at PSG last season. It seems, for some reason, it's a bit hard to say, but in his era he probably wasn't that tall anymore. However, we don't know the reason for a big club in the EPL to recruit him later. Who knows, there really is a club and coach who is perfect for him, whether it's Man United or other clubs.
I highly doubt that Pochettino will be a good coach for Chelsea. I know he has the experience of the premier league and all, but so did Lampard, so did Potter.
Looks like yes, for some reason lately I've been a little doubtful about what has always been considered suitable and good for Chelsea if you look at how they performed last season. But indeed Pochettino may still not be suitable to become the next coach.