How can any of us say whether he will succeed or not? We can't, but all the club can do is go for the best option at the time. In Martin's, I think Acun realised he aimed too high, so IMO, they have got it about right going for a young English coach who clearly has a future in the game.
Getting in an experienced manager as we know doesn't always work, ask West Brom and M'boro that, but giving an articulate, bright coach who is a student of the game a chance is probably at this stage of our development the way to go. Bournemouth did it with Eddie Howe and he has not done so badly, as has Potter who starting overseas, so I think this is the best option at present.
Liam reminds me very much of Marco Silva, and he was a breath of fresh air when he came to the club, it took him a bit of time to get used to the English game but he is now showing his true value at Fulham.
Yes it's a gamble, but if he is given time, then I am sure he will succeed, but as always as Tickler used to say TWT.