Perhaps if support were improved slightly, more people would be willing to play support.
If the support could carry more rounds per clip in the M4,if they could carry 5 instead of 2 smoke grenades, if they had the option of a machete and also if they could carry grenades, perhaps more people would be willing to be support. I hate it when a team of eight has only one support. How can one support keep up with wall building, repair and flag protection. Also, they think support can build walls and protect the flag all at the same time. On offense support is always necessary also. Maybe with these improvements, more people would be willing to take on the role of support and learn that there are advantages to being a support person (speed of movement, stealth, etc).