Skarner spires are a poorly thought out gimmick. If they are strong, Skarner is too weak outside of them. If they aren't strong, they are pointless. In either case, they are a portion of his power that can be completely denied by his opponents, and requires your entire team to upkeep. Currently, I DO play Skarner top, and to decent success. I have YouTube videos trashing the likes of Ryze, Fiora, Nunu, and even Swain. His spires are currently in the "too weak to care" stage, and it's still an annoying passive to have for your team.
The spires were "uniqueness for the sake of uniqueness" and a "homage go the dominion game mode"... it is not a fun or meaningful gameplay ability. It's just dumb thematically. Even with his new lore, he is looking for the thieves and his brethren's life stones, not protecting some dumb spires.
Lore, original and new, his kit, and his fantasy all point to Skarner being a vengeful hunter/ protector no longer.