Finn, part of the problem comes from some of the more iconic cyberware (Wired Reflexes, Muscle Replacement, Bone Lacing, Dermal Plating, etc.) tend to have grandfathered in Essence costs. There would be complaints if you were to lower those costs, even by calling them advances in technology. Especially when it's something that's done pretty much the exact same thing each edition.
One of the best ways to go essence wise, if you're looking at building a tanky augmentation char with stat boosts, is to go for a cyberbody. Because right now you can get Titanium Bone Lacing and level 6 Dermal for 12 extra soak and level 4 muscle toner/augmentation for a total of 6.1 Essence or you can grab Orthoskin 4 for 2 less Essence, or Muscle Replacement for 8.5. A full cyberbody costs 6.25 and can get higher armor and either more health and almost as good of max stats or equal (possibly better when we get more clarification on Redliner) max stats. Plus more. The downside? You're probably going to be pretty obvious.
For reflexes... well Synaptic Booster is King in terms of Essence Friendliness at level 3. Synaptic Accelerator costs less Essence but only has one level, but it can be stacked with Reaction Enhancers. Wired Reflexes can be turned off unlike the other ones and can be stacked with Reaction Enhancers. Move-by-Wire has the highest average boost by itself (10-16, avg. 14 vs 3-18 avg. 11 for Wired Reflexes and Synaptic Booster) as well as acting as Skillwires. The big problem comes in the difference of Essence cost. 1.5 vs. 5 is a no brainer most of the time, doubly so when it's harder to detect.