I think Inacio should stay at Sporting one more season before even thinking of a move. Still has room to grow as a footballer and I believe he needs to add more muscle mass especially if he wants to make it in England. Sporting will be fighting for the title again next season and will play in the CL once again which would be huge experience for him.
Now with that being said I understand why ETH would be interested in Inacio. Inacio is a ball playing center back who is very comfortable me with the ball in his feet. He has created constant chances at Sporting due to his long passed and even has some assists to his name. Inacio is comfortable on the right or left side of the defence but he has mainly played as a RCB in Sportings 5-2-3 formation.
This season he should be playing at the LCB position with the signing of St Juste who will be playing on the right.
Sporting will most likely sell Joao Palhinha to Wolves this summer and with the money we are getting from Nuno Mendes who PSG are paying for in July and the guaranteed CL money their is no reason for Sporting to sell.
PROS: Comfortable with the ball in his feet/ball playing CB (see above quotes with video footage in the thread), reads the game well and can play on both sides of the defence comfortably. Reads the game very well
CONS: small frame (this worries me for the
EPL, always looked like a player who would do better in La Liga) sometimes gets caught in behind and lacks concentration at times. Right foot also seems to be a weak point.