Based on where all the dust is on the table, I'd guess you weren't taking a full kerf saw cut. Were you mainly just taking a little off the edge of the boards? If that's the case, even if you also added an overarm dust collector you're going to be disappointed. On those type of cuts, the dust mainly gets ejected sideways instead of above or below where the dust collection is.
I do not prize the word "cheap." It is not a badge of honor...it is a symbol of despair. Cheap prices make for cheap goods; cheap goods make for cheap men; and cheap men make for a cheap country. ~ William McKinley