In reply to Paul at work:
1. Nice holds. Hard as necessary for the grade, but ergonomic, more than for a bouldering wall in my opinion. Same brand and hold phylosophy throughout the route, especially try not to mix minimalist shapes with baroque/featured ones.
2. A line that zig-zags a lot yet manages to always get you to a reasonable clip.
3. A mandatory handhold sequence, but several foothold options.
4.A strong choice about the character of the route. A ladder is ok, Techy is ok, powerful is ok, 1st half powerful into 2nd half techy is ok...a bit of everything is not and makes all routes feel the same...
5. If there are weird/tricky moves, they should be appropriate for the level and self-evident to someone having the level to onsight the route (bizarre and insecure is totally ok, unreadable and hidden isn't).
6. No extreme flexibility requirements. Throw an extra shitty foothold in, and leave the flexy stuff for the boulder wall
6.A smart use of non hold features (aretes, dihedrals, volumes). If one can grab the arete, smear/palm the dihedral, etc...don't put any hold or put a shitty slopey thing just to show the way. But don't overdo it.