Maps That Could Be Added

de_cpl_strike
de_season
de_russka

Maps That Could Be Taken Out of the Rotation
cs_coldwar
de_icehouse
de_tropic_enhanced
de_beachassault
de_torn_ht_beta3
csp_forge
de_solitude
de_hairyhouse_b1
cs_siege_2007

Updating the versions of mill and contra is a good idea too.