I personally don't have an issues with characters who are flawed, not every person is perfect, in fact flawed characters are often more entertaining. My issue with the recent development is more that she still maintains the same character flaws after 160 chapters of development. I would have expected her to improve by now but it seems as though the author likes to reset her character development to add drama. I also don't particularly have any issues with cliché's being used, but there is a difference between incorporating a cliché and relying on one, ultimately it comes down to execution which is where this falls short. Having said that I actually rather enjoyed this chapter, none of the characters acted irrationally and it was a breath of fresh air. I would appreciate if it continued with this awkward but quite charming tone, but we all know that it won't for now. However, as long as the drama doesn't last too long (which I fear it might) and we get back to this awkward but charming and lovable tone soon, I won't particularly mind.
P.S. I apologise if you are getting annoyed with my long-winded comments, this will probably be the last one until the next arc as I have pretty much said all I need to say. Sorry.