Don't get hung up on all the arm chair judging. This is a drama to sit back and just watch. With some giggles, ooo's and aaah's and just mind fun.
Scenery, costumes, acting, and different episodes all have different levels of good and really good. I personally see this as a light drama compared to some of the more heavy weight ones.
To many heavy ones in a roll is not fun. So have lighter ones in between is good to have and allows us to see more ingenuity in production by all areas of the drama to keep it light but nice and beautiful.
I hope those who make dramas will remember to give us rom-coms regularly in the costume era regardless of those who would pick them apart from an arm chair. Especially making them not necessarily stupidity silly, but fun, funny, active, and bantering between in them dramas.