Hi Dr_NANO,
yes, the sequence value is dominating the battlefield, which is good to quickly neutralize threats (Aliens hit hard!

) but may be grating for the slower players at the table.
You could adjust your team composition to match sequence values (and adjust mission difficulty) or change the mission design to give more things to do than just shoot. (infiltrating, investigating, etc)
In our game we switched to a mashup of Contact sequence and Shadowrun initiative rules. You loose some fine control, but everyone gets to do (and shoot

) something earlier.
About XP:
- The XP gain for "leveling" combat skills is reduced, compared to non-combat skills.
- you can train skills at your base in the "off-time".
- high intelligence is also good for quick leveling, your field scientist will overtake your gun bunnies sooner or later
