If you were to work with a fine traditional 3-way you would be confronted with the lack of coherence of the quasi-line source array. I know, I know, you think it couldn't get more clear, delineated. That's wrong, and you would hear it immediately with a great 3-way. But, you would lose some of the characteristics of the line source in the process. It's all trade-offs in speaker design.
Now, corelli, if you want a very interesting experience, switch back and forth over time between the two, panel and line array. You will be shocked at how "wrong" in comparison the other sounds as you adjust to the one playing. It takes time to adjust to a new speaker technology when you have been using the other. But, once adjusted it sounds "right" to the ear. Then, when you switch back again you have to readjust. But, sure enough, over the next few days it sounds more and more "right" to the ear. It teaches one to pay attention to the more nuanced variables of sound production and how one technology cannot capture the essence of perfect sound reproduction.