What I miss is the fumbling with the stripper clip while reloading. Perhaps that sort of animation could happen when suppressed. That would be cool.
Delayed/clumsier reloads would be a great way of making suppression more effective in game. It would semi-realistically represent the decrease in ability to return fire soldiers have while being suppressed.
Also at 100% suppression the chance of a "fail" reload would be nice (either drop the clip, or jam when cocking or something), which means you need to hit reload again.
Since it would only happen rarely when heavily suppressed, it wouldn't be as punishing as random jamming would be, since if you're heavily suppressed you can think "Right, I need to reload but I'm being suppressed, so I can either risk a reload, or run to better cover and reload when I'm less suppressed".
Which gives a lot more tactical options than guns just randomly jamming every 100,000th shot.