For a first-year rookie I think he did fairly well. He's no SBW but we have more experienced players who have less upside.
Definitely needs to work on his defensive reads, mobility and stamina, but that's all part of having multiple pre-seasons under his belt.
Also OP and some others seem to have missed the background that tiga4eva notes - Aloiai was signed by Tigers whilst he had a fractured hip and did not have a proper pre-season. I'm not surprised he toiled a little in the final rounds, considering he played every match and was getting 40-60 minutes in each of the last 7 games.
**It's not a great defensive pairing to put him with Moses, but it's not exactly Aloiai's fault that Moses is a turnstile.**
It's his job to cover inside of Moses - and he went missing yesterday.
Overall though I think he will be a much better player next year.