> We use a strongly typed Lua-like language at my company [...]

Is this homegrown? In my experience this alone has a major impact in productivity because it is generally hard to create a good implementation and a new language and/or implementation only pays when the existing solution is too bad. (Source: I have made a Lua type checker at work. It worked, but fell into disuse as I moved on and the entire org abandoned Lua in spite of my work.)