Former Celtic goalkeeper Pat Bonner believes his old club must recruit another striker for next season and also questioned whether his countryman would be more effective in a front two.
"They have spent about £9m on Adam Idah," he said on BBC Radio Scotland.
"They could go that high again, just to get that out-and-out striker who is going to bag goals.
"They have to get somebody in there. They can't rely just on putting Maeda in there and Adam.
"Adam is young enough and scored today, but I don't know whether he needs something alongside him to help him."
Brendan Rodgers has spoken often about Idah's attributes and the Celtic manager was once again effusive in his praise at full-time.
"Adam doesn't get criticism from us, we know his qualities," he said.
"This is his first full season here, he's only going to get better. He's a player for the big moments. He scores big goals, in big games. He will get better all the time.
"People are judging him on his price tag, but he doesn't set that.
"He's a real handful for us and has shown that at every level, he gets goals."
Idah's leveller delivered a satisfactory outcome for manager Brendan Rodgers as it prevented a third straight loss to Rangers and maintained the 17-point gap over their second-top city rivals.
"At half-time, I still felt we were at a good place in the game," Rodgers explained.
"Second half, we controlled the game. When you come to Ibrox, you sometimes have 10-15 minutes where you're under real pressure, backs to the wall, but I never really felt that.
"If I was to criticise, maybe our final-third play didn't lend us to creating opportunities. But our build-up was composed. We got the goal, we deserved it."