LW is probably glad that his seat is contested. everyone won their seats and enter parliament, he as the PM enters parliament through a walkover, zero vote. it is so weird, not ideal scenario.
the minor oppo parties contesting the election will increase PAP's popular vote. but if they don't contest, many voters will not get to vote, and PAP can fully devote and consolidate its resources and manpower in rest of the constituencies.
EBC is owned by the Pan-Green camp. but they have some strange business ties in China. their political stance can be considered neutral, not one-sided supporting Blue or Green. their political issues stance shift often depending on public opinion.