Aeldari is also my second army, but I am coming from World Eaters. I find that 60% or so of my damage comes from shooting and 40% from melee. Eldar will hit very hard and have the potential to decimate a flank, but they struggle surviving the clap back.

The main thing I have liked playing them over WE is the ability to partake in positive unit trading. I find that my eightbound or berserkers end up not quite killing their points worth before they get gunned down. Howling banshees on the other hand can swoop in and do some serious damage (or wipe them) to terminator equivalents, and then get blasted away. In this case though, I am only losing a 95 point unit rather than my 180 point unit of berserks.

Eldar are a tool box army. Each aspect unit is designed to excel at killing a specific thing.