The midfield is the only area I think Liverpool need one or two new players. Milner is getting old and Henderson is getting injured often. Thiago is a nice buy, and will fix some midfield issues Liverpool has, the price tag is also very affordable and imo it's a good deal overall.
I'd definitely disagree here and my opinion is that central midfield is the only part of the team that has deep cover and variety. Let's go position by position:
GK - Alisson and Adrian are a good fit. Alisson is a top keeper, Adrian did well most of the season. He cost us the FA cup and CL but that can be expected from a back-up keeper. No changes needed there.
LB/RB - Tsimikas added cover to LB position, Williams will do the same on RB. Fabinho and Milner are players that can also jump in if needed.
CB - another player needed for depth after the sale of Lovren. Dijk is great but Matip and Gomez are injured really often. Gomez was also out of form lately.
CM - great depth here. Fabinho, Henderson and Wijnaldum were the most picked but we still have Keita, Milner and Chamberlain as substitutes - also Minamino in an offensive role.
LW/RW - cover needed, Shaqiri and Origi simply did not do enough. Minamino as well, but he only had half of season so hopefully he'll do better in 2021.
ST - Firmino is the only one but since both Mane and Salah can play ST and Minamino and Chamberlain can cover 'false 9', I'd still prefer a winger instead of a striker.
Based on all that, I'd say Liverpool's priorities in the transfer market are as follows:
- a player that can cover one of the wings and false 9
- centre back that can compete with Matip and Gomez
- back-up striker
- creative midfielder
I'd definitely bring Thiago, I love how he plays. I just disagree that Liverpool needs to strengthen midfield first. It's actually really good - but it would be even better if we brought Thiago. In that case, one player will leave for sure because we already have enough midfield players. I love Milner but hopefully it would be him, I still think it would be really good if we managed to keep Wijnaldum.