Hi !
Thanks for your feedback! I will check all your mentioned points and will fix them.
About template engine. Fenom is not very popular now, but it has big potential, I think.
Fenom is super fast and lightweight, its syntax is similar to Smarty and they have a fallback class for smarty templates. Fenom Repository: https://github.com/fenom-template/fenom
Fenom Benchmark: https://github.com/fenom-template/fenom/blob/master/docs/en/benchmark.md