Parameters t-reordering, t-PollRetransmit, PollPdu, PollByte

From where this theory driven? I find it give advantage always.

This indicates that tpoll retransmit high value has advantages that retransmission will be less congestion can increase and RLF can be avoided.
What’s t reordering for?

We need retransmission too as if less than threshold it is a drawback for throughput.
But good RF will bring that advantage I believe not poor.