It isn't as sniper friendly as it might appear at first glance, it doesn't have a bunch of spots like Temple of Anubis that put a widow or hanzo out of reach of characters that don't have mobility to get to high platforms. There are lots of flanking routes to any decent spots to snipe from and people can easily break line of sight so a half decent tracer can easily harass a widow.
I don't think it is great for phara, you can pick some different paths but I found that getting a good position from one angle puts you at risk from several other angles and people have lots of cover so that if you fire medium to long range shots they can get out of line of sight before you can finish them. You get forced into close range engagements to be really effective.
Junkrat seems really good because of all the surfaces you can bounce nades off and place traps on flanking routes, but is has been really good for awhile with the shields being used.
I think this might be a really good map for reaper, you can use cover to get close and with all the health packs and with how teams can get split he could pick a team apart. Lots of spots to drop from and use his ult too.