Some further ideas.
Since one of the issues is that a wooden pickaxe can get you down to bedrock level (avoiding obsidian/lava enroute) the whole tool progression is pretty "weak".
Instead, what if tier 1 pickaxe can only mine weathered stone, coal, tin & copper? Weathered stone is any stone block above level 64 that has one of it's sides exposed to the air. Below level 64 there is a % chance based on depth that a stone block converts to weathered stone. It could break down into small rocks & flint, and be your first tier of crafting material (an oven to cook food, a furnace to cook tin & copper, a basic alloy smeltery to make bronze). Early game mining is pretty much just exposed ore veins and cave systems.
I see the progression for mining being as follows (simple enough for minecraft standards, without being a total conversion). Adds a lot more mining & crafting to early game without overly complicating things.
Tier 0 - Scavenging
Find rocks on the surface that you can pick up, these will be basic rocks or flint. Find sticks in trees. Bones. 2x2 crafting only making first basic flint/bone tools. No punching blocks to break.
Tier 1 - Flint (aka Wood era in vanilla minecraft)
Can now chop down trees, and dig into weathered stones and tier 1 ores (Coal, Tin, Copper).
Tier 2 - Bronze (aka Stone era is vanilla minecraft)
Can dig into normal stone and iron/gold ore. Bronze is needed for a furnace that can cook iron/gold ingots. (at this point, plug into Tinkers Construct so Grout can only be cooked in this tier furnace)
Tier 3 - Iron
Can mine redstone & diamonds (and other modded ores). Once at this tier, you have unlocked most tech mod access, since most need Iron.
Optional extra, have a "dense stone" material underground that can only be mined by iron tools, to restrict Bronze tools to higher levels underground.
Tier 4 - Diamond (optional, for obsidian/durable tools)
Gold tools totally ignored. All vanilla tools should be low durability for "decorative" purposes (and to ensure mod recipes still work). (Wooden sword unchanged, as it's basically a club, which would work perfectly fine whacking things over the head with...)
Since one of the issues is that a wooden pickaxe can get you down to bedrock level (avoiding obsidian/lava enroute) the whole tool progression is pretty "weak".
Instead, what if tier 1 pickaxe can only mine weathered stone, coal, tin & copper? Weathered stone is any stone block above level 64 that has one of it's sides exposed to the air. Below level 64 there is a % chance based on depth that a stone block converts to weathered stone. It could break down into small rocks & flint, and be your first tier of crafting material (an oven to cook food, a furnace to cook tin & copper, a basic alloy smeltery to make bronze). Early game mining is pretty much just exposed ore veins and cave systems.
I see the progression for mining being as follows (simple enough for minecraft standards, without being a total conversion). Adds a lot more mining & crafting to early game without overly complicating things.
Tier 0 - Scavenging
Find rocks on the surface that you can pick up, these will be basic rocks or flint. Find sticks in trees. Bones. 2x2 crafting only making first basic flint/bone tools. No punching blocks to break.
Tier 1 - Flint (aka Wood era in vanilla minecraft)
Can now chop down trees, and dig into weathered stones and tier 1 ores (Coal, Tin, Copper).
Tier 2 - Bronze (aka Stone era is vanilla minecraft)
Can dig into normal stone and iron/gold ore. Bronze is needed for a furnace that can cook iron/gold ingots. (at this point, plug into Tinkers Construct so Grout can only be cooked in this tier furnace)
Tier 3 - Iron
Can mine redstone & diamonds (and other modded ores). Once at this tier, you have unlocked most tech mod access, since most need Iron.
Optional extra, have a "dense stone" material underground that can only be mined by iron tools, to restrict Bronze tools to higher levels underground.
Tier 4 - Diamond (optional, for obsidian/durable tools)
Gold tools totally ignored. All vanilla tools should be low durability for "decorative" purposes (and to ensure mod recipes still work). (Wooden sword unchanged, as it's basically a club, which would work perfectly fine whacking things over the head with...)