I agree with you. When people talk about our CL teams, they tend to forget the impact that players like Tomasson had on our squad. I'm not saying Origi is as accomplished as JDT, because he isn't, but he was crucial in Liverpool winning the CL.
When we won in 2007 R9 was huge, because he was able to play in Serie A, giving Pippo rest domestically. R9 was a big part of our 2007 run, even if he didn't play a single minute. Again, R9 is obviously a legendary player, but having different players, different looks to give opposing teams, people you can rely upon, having a deep squad is important. Origi adds to our depth, so why not?
We obviously look to take advantage of situations, and strikers (especially now that they are so rare) are expensive. I don't think we need to pay a ton of money for a RW, as a profile like Faivre shows, he's just unprofessional, but I'm sure we can grab someone of his quality and price in the summer. Gabriel Jesus, to me, could come for 25-30m, and would provide solutions to multiple spots, but Ludovic Blas at 15-20m is another sharp choice.