Ha ha can't believe you're still chatting about this!!! You're like a dog with a great big fucking bone!!! (No offence meant)
My understanding of what you're trying to say is that Txiki has done a great job getting players and manager in. However, he has done a poor job in planning for the future and should've been doing things differently for the past 2-3 years.
Perhaps if you could explain what you think he should've done, as in who he should've got rid of and who their realistic replacements should've been, taking into consideration that we had a finite budget per annum due to FFP, then everyone might be able to see where you're coming from a bit better?
You're right, I have done this to death. But normally in direct response to either valid questions or insults from the less open minded.
I've actually addressed your question or similar earlier on.
I'll paraphrase.
I haven't got all the answers, but I'm not in this position.
Three options I would have considered. All hypothetical, I as many have said, we've no exact remit of his job.
Sell players earlier in their contracts. Sell closer to their peak. Taking a gamble on perhaps losing out on one more good year.
I suggested YaYa and Zaba in 2014, their stock was high, would have been desirable to many. I admitted this would have been a very brave decission. One I wouldn't have made at the time.
Not offering players already in their 30's 3-4 year deals. This is something that other clubs certainly don't do. Especially for squad players.
Recruitment, Don't sign Mangala for £30 million plus and then Sagna for free. If you only have a budget restricted by FFP, don't spend most of it on one gamble. I rate both by the way, especially Sagna.
Hindsight is wonderful but we could have signed Otamendi rather than Mangala and added a younger less established right back.
It's not like we haven't signed Otamendi a year later for twice the fee.
As I say, all old ground and pretty far from easy to suggest or call. It's not an exact science.
I haven't got the answers, all I've done all along is suggest whilst we should praise Txiki for the good he's done, there's still concerns and our ageing squad is one of them. They guy himself is actively working to remedy this.