Basically I remove the option to break logs and you instead get sticks from saplings. Then you start making tools and weapons like
@ljfa said and you end up punching dirt or ExNihilo Sieving dirt so that you can get stones. (Not Cobblestone, ExNihilo Stones that are MineTweakered to be unable to make actual cobblestone) Then you start knapping the stones to make a stone handaxe which can be used to craft a stone shovel. The shovel allows you to mine sand so that you can get more stones at an easier pace. Then you start searching the world for some ruins that contain chests with flint fragments in them. Combine 4 Flint Fragments into 1 flint so that you can make a flint shovel so that you may mine gravel and clay. 4 Gravel can be made into 1 flint fragment and clay is used for ceramics and TiCon Smelteries. Fire the grout in a Stone Kiln (Renamed Furnace) and finally craft a smeltery. (Revamped recipes to require less grout overall but more complex crafting) However, crafting said Smeltery requires a crafting table, so you must use2 of your Flint to craft a 8 use Flint Axe and cut down some logs. With it, by crafting a log with an Axe you are able to craft 1 plank at the cost of 3 Axe Durability. So it will overall require 2 axes, and thus 8 Flint, or in other words 32 flint fragments to make one crafting table. Only once you obtain a crafting table may you make a smeltery and thus able to smelt the copper. Of course you'll need lava and thus you'll need a clay bucket. Problem is that there are Lava Monsters in this pack so getting that lava will be very dangerous.
And that is how the Stick age works (Still in dev, end product may vary)