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Skyline

Yo, pal, nice map. I'll state few suggestions though -
1: Visually your map lack design spirit, it's not catchy enough (i'd suggest change background color of lower part of the map at least, right now top and bot parts feel the same, breaking map into diffirent segments visually will really help the players adapt). Try to think up some interesting design choices asset-vise.

2: It's an easy and calm map, it's hard to make mistakes here, so players will get bored after few laps in; it'll help to add some interaction-between-players segment(s).

3: Almost whole map is grappling, you can change few map segments into long jumps without grapple-ceiling or any other trickery to help it being more fun competetively.

4: Use checkpoint helpers to dissect map into segments (screenshot below), it'll greatly improve checkpoint logic http://i.imgur.com/9gHPoPT.jpg

tl;dr Map feels pretty minimalistic. A lot of players like that, but it still lacks opportunities for tactical plays.