He was meh and scored a open goal from a rebound.
Not really something to celebrate.
Give it some time. The season has just started. You don't even know the CL group. You want your star player to peak at the right time of the season. You gotta persist and play him back into his form.
You'll say "Why this special treatment for him?" - because of his career and coz the Barca staff knows what he's capable of. He has credit in the bank. Everyone knows that a fit and firing Lewy will score for fun.
Also, let the system gel and flow. Barca haven't created much so far. The current system with 4 mids is uninspiring. Gavi as LW won't cut it.
Once Cancelo comes he'll get better service from wings and the team will have better mobility and pace.
Balde is a very good ball carrier but his crossing and end product is amateur level.
You cannot treat Lewandowski like you'll treat other ordinary players who haven't done shit in their careers. Be patient.