Wow, looking at those stats it would appear Lucic had a pretty bad 13/14 season compared to his teammates. At least I think, that's a lot of colors and professional looking bar graphs that I'm not really sure I understand at all. Comparing those to stats I do understand though:
2013/2014
TEAM|GP|G/60|A1/60|A2/60|P/60
PATRICEBERGERON|80|1.21|0.71|0.6|2.53
BRADMARCHAND|82|0.97|0.92|0.49|2.38
DAVIDKREJCI|80|0.73|0.78|0.87|2.37
MILANLUCIC|80|1.02|0.87|0.46|2.35
JAROMEIGINLA|78|1.28|0.56|0.46|2.31
CARLSODERBERG|73|0.75|0.88|0.48|2.1
Those were the Bruin Leaders for 2013/2014. Simplifying things and looking at points relative to actual ice time, Lucic appears to have been right on par with everyone but Bergeron. Depending on how you weight goals, primary and secondary assists, an argument could easily be made for him putting up more appealing numbers then guys like Krejci, Marchand, and Soderberg that year.
To take it a step further and look at last year, I again get confused by Lucic's steady decline. It looks more like an overall issue with the team itself. Lucic again looks to have hung tough with team leaders, he and Marchand lagging behind in really just one category, secondary assists.
2014/2015
NAME|GP|G/60|A1/60|A2/60|P/60
DAVIDPASTRNAK|46|0.88|0.77|0.77|2.43
PATRICEBERGERON|81|0.94|0.83|0.33|2.11
RYANSPOONER|29|0.55|0.74|0.74|2.03
DAVIDKREJCI|47|0.43|0.69|0.78|1.91
BRADMARCHAND|77|0.96|0.73|0.22|1.91
MILANLUCIC|81|0.85|0.59|0.37|1.81
I don't know, it looks to me like Lucic's drop coincides with the entire teams drop in performance if anything. It'd be interesting to see similar analysis for the rest of the top 6 for comparative purposes.