Is the Loyalist-Dwarf matchup broken? | Wesnoth Ladder Replay

For a while there have been complaints about the Loyalist vs Dwarf matchup. The latest patch did nerf the spearman, which prompted players to try out different units. And in this matchup, the mvp became the heavy infantry. This video showcases a high level game of Loyalist vs Knalgans and the strength of heavy infantry in this matchup. I'd like to use this as a ground for a discussion about whether this should get patched and possible fixes for this matchup if you have any. Replay details: Map: Sulla's Ruins Players: Haldiel vs Hero Factions: Knalgans vs Loyalists