People like Boardwalk over Reflection? Gross.
1-flag on Reflection in TO is generally good, no Jetpack in the loadouts, for instance. The map itself is similar than Ivory Tower, but the movement and jumping makes it different, however.
If you're to talk small asymmetric maps, bring in Turf, or mid-size+ you bring in Zanzibar, Burial Mounds, Terminal, Relic.
Powerhouse itself is fine, but until they figure out a formidable manner for 1-flag and 1-bomb it's going to be one dimensional for strictly slayer and in my mind that gets boring at a while. A map has to be diverse.