I get why it will be for better Championship players. I live in Ipswich and my daughter plays for them.
McKenna is a big attraction to players who want to develop. He has a clear way of playing and sets up in every game to win (as they did away to Hull in a crucial game at the end of the season - finishing 3-3 in the end). He was by far the best signing they'll make this summer getting him on a new contract. The talk around the club was that he was all but gone to Brighton, but Chelsea/Man Utd turned his head, neither worked out and Brighton then said no thank you to being second choice.
Players like Greaves and Philogene fit his system and style and would be regular starters. Even if Ipswich go straight down - which if they sort the defence and become a bit more pragmatic against the top sides, they wont - both will have played plenty of top flight football and be better individual players - so either stay and get them straight back up or be able to secure a move to another Prem team.
Would Dyche be guaranteeing either of them a first 11 spot - doubt it. Greaves would be behind Branthwaite (if he stays) and even then, Keane I expect (whatever we may think). I doubt Philogene would start off ahead of either McNeil or Harrison, especially if Ndiaye is in the mix - that would leave us far too open to play Dyche-ball!!
Id counter that by saying Ipswich have a shelf life mate, all those clubs do, could be that Maguire walks out for Chelsea in three months and the club gets thrown into turmoil. For sustainability in the PL you need a broad base. Even at our worst, our broad base of income, fans, status and profile saved us. If Ipswich rely on one thing like a manager - its a short shelf life, they've nothing to fall back on. Sure all going well they may have a good season - but like say Brentford or Burnley before them its only a matter time before the sink drains. I said last year when both Brighton and Brentford were in vogue they would be relegated before us and i still think they will - Brentford made a stab at it last year - those clubs have a shelf life and only a couple of tricks up their sleeve.
Point being, when choosing a club, do you want a 5 year PL contract and profile with a club that hasn't been relegated in 70 odd years, or a team that could be gone with 1-3 seasons.
If the lad chooses a club like Ipswich over us, he's not the right player for here and i wouldn't want him.