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While mono cameras mean more work, they definitely provide higher resolution and sensitivity.
Tri and Quad band filters are marketing gimmicks at best, as if you use them with a colour chip, 2/3rds of your pixels will be blind to the any particular emission band. NB with colour cameras is simply not optimal.
Mono filters allow you to use all of the pixels in whatever band you want, plus unfiltered give you appreciably more signal for an L channel.
As an aside, if you calculate sensor resolution in a mono camera in the same way as colour sensors are, you triple the sensor's effective number of pixels. Hence a 16mp camera gives you 48mp of RGB data, add in a luminance channel and you have 64 megapixels ! ( you are taking four exposures, rather than one bayered RGGB set...there is no free lunch, as colour cameras simply interpolate the data back to the mono resolution of the sensor)
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