It doesn't have to be starting 11, my comment was about people quoting the starting 11 as a reason we don't need to be buying. We need to improve our starting 11...or our bench....or both in my opinion to compete in what is likely a much improve premier league and the champions league. I'd have taken boufal, mane, isco certainly. Zaha and Sissoko can't say im too upset about missing on. But theres plenty of players out there who could be good bench options. And sure if we make top 4 next year i'll be happy to eat crow or do whatever shaming i can on this forum. Hell I was dead wrong last year, but in my opinion we are taking a huge risk that we are deep enough for all of these competitions and that all our players will maintain form from last year, which for the majority of them was the best season's of their career.
Really though....we were the youngest team and brought everyone back, I agree our first team is excellent, why not fill out the squad to protect against injuries and improve our bench options. If we don't push in this season, when we have plenty of money a good base to build from, when is a good time to push in?