Even though the lower difficulties should give a reasonable number of points, the top players on each chart will likely be the ones who play the hardest difficulty, anyway. For players with less playing capability, there are still some maps with reasonable score spreads. (Angels, What If, What You Know...)
I'm sorry if you don't like all the songs on the chart, but some people do and the song choice is not related to the quality of the maps themselves. I'm sure you're aware of this, though.
I don't know why you would say that the maps on this chart play the same, most of them seem pretty different, at least to me. You have jumpy maps, symmetrical maps, streamy maps, a swing map, and more. I'd say there's enough diversity in this month's choices.
I can't change your mind about the quality of this Monthly Chart, but we did try our best to make it fun. Thanks for your input.