This may be because Crisis Suits got T5 and 3W. Roughly doubling their survivability against basically everything is kind of valuable, I think. And anything without Fusion Blasters is closer to 50% increased in price than doubled. Broadsides tripled in Wounds and also got T5, and their shooting is way nastier now. No wonder they cost... Right, yeah, twice as many points. Stealth Suits are basically exactly as many points as in 7th with 2W, as well.
Ghostkeels basically didn't change in price, and are probably the standout unit in-Faction from what I can tell thanks to having decent firepower at a reasonable price while being nearly immune to attack. Stormsurges are almost exactly as expensive as before, albeit with a bit less firepower than they used to have (but Advanced Targetting on them is... Really nasty).
But yeah, it does rather look like Tau are going to be wanting less Riptides and more Fire Warriors these days. Big blobs of Strike Teams supported by a Fireblade and an Ethereal looks like the most cost-effective method in-faction for bringing anti-infantry firepower to the table.