Lo Celso is a terrier who gets stuck in and can play a bit, in no way is he comparable to Eriksen.
If you're looking for a frame, you might in fact think about his compatriot Lamela, who has similar attributes.
I absolutely agree he could offer more goals and assists.
We play him as an 8 in a Modric type role rather than 10. If we played him further forward then yes, ideally we get Ndombele fit and get a DM inbehind then we can push him into a more attacking role like he played for Real Betis