Even if there was the will,the money & the traffic to support major expansion at Leeds, it still couldn't happen, the land to the SSW of R32 is a large hill (behind Multiflight) further west there is housing, a factory, to the North there is the terminal, the old Avro factory, to the East the land slopes away rapidly, so the airport is hemmed in due to terrain and airport fixed infrastructure.
What could be done is a parallel taxiway, but even that would involve major bridge work over the access road and would eat into the apron area and we are talking 10's of millions, Leeds could probably grow to 5 million with current layout and a move to larger aircraft such as the 738 v 737 and A321 v 320 will help that
The only money needed would spent internally or car parking where you get a very quick return on money spent, that doesn't require vision or planning permission
It a good bucket & spades airport, but will never be a long haul hub