I think the LCA FO bidding item affects a lot more than 180 pilots, and has financial implications as well. Think about it. These are 180 senior FO jobs.

In addition to monthly hits on QOL that will wash down the bid list including the block/reserve issue previously mentioned, removing these jobs will slow EVERY advancement the lower part of the seniority list makes until they pass the point on the seniority list where these pilots are "re-injected". Consider the cost of every delayed upgrade along the way. This cost is proportionally more the lower you are on the list since you'll be delayed in more upgrades.

To illustrate: if there have been 15 guys ahead of you disappearing from the list each month and 180 jobs are lost with the LCA bidding part of the proposed TA, it could delay some upgrades for up to a year (15*12=180). Look at the difference in pay between WB FO and NB FO, or WB FO and NB CA. Losing that amount for a year will certainly cut into that 8% raise, without even considering that your QOL will likely be reduced due to the reduction in relative seniority you'll have every month.. (note-- the upgrade delay does become less as more guys retire and the list moves faster, but it's there nonetheless and represents a real financial hit to pilots below the guys who normally bid with LCAs)