It's a good rendition, but I do have a problem. I'm not trying to be mean... but it looks really... Unclean, the ramps and transitions look wrong and awkward, but it looks like it would play well.
Your both dead on as this is just a practice map it was made for just that practice and have fun. The ramp's suck altogether and you can only have two lights. Now as for unclean Yes a lot of the Hydra map was extra and filler that had no room being in a simpler map that was based on Halo CE in short Hydra was a MLG map and what this was made to reflect was the Halo CE map before it became a Halo CEA practice map.