I thought it was funny, but was honestly waiting for George Salazar to come out of one of the stalls. My mother loved, and when I mentioned it was a parody of a show that was't nominated she became really confused. I just wish that Corden or the producers did something within the bit to call out that its from Be More Chill. I get that they probably assumed based on the cast albums airplay, that many in the community and tweenagers understood what they were parodying, but the Tony's audience much older and likely don't get the reference. I get the bad blood between the those involved in the production and the American Theater Wing, regarding the lack of love for the show, but they do have a point for being upset for this. Even if there was a quick picture of the The Be More Chill marquee, the producers should of done something to make it know they were parodying the show. After all, Be More Chill is no Hamiltion, nor Dear Evan Hansen, and has been struggling since the Tony nominations were announced, so outside of the theater community, so I am sure the parody aspect went over the heads of 75% of audience.
Regarding the animosity between the production, I was walking in the Theater district the night the Tony nominations were announced, and ended up walking behind one of the better know cast members of Be More Chill. S/He went on an all out tirade about how the show was treated by the nominating committee, and how S/He felt they were purposefully shunning the show in hopes of it hurting the show's commercial viability. It was quite eye opening, and was beyond the more understandable "Why?" rant. This cast member clearly felt there was some vendetta that the nominating committee had with the production.