with regard to the question "Is this a large number of deaths?" No, it's not.
Recall however, the trauma inflicted by that mass shooting in Fla or the ones recently in Texas or Las Vegas. The entire community was traumatized. At Parkland, the entire student body is now dealing with the horror of that day, many having seen friends gunned down in front of them. So, the number might seem small but the effect of the crime was felt by many. It was a heinous crime. Don't minimize gun violence by saying "just 30". It's simply not the same as "he died due to kidney failure" or "natural causes".
All I'm asking for is a reduction in gun homicide rate to that of Canada or perhaps Australia. In that light, 25 to 28 people murdered by gun in 2012 would still be alive to this day. These are preventable deaths. You say not bad? Again, look at how the Parkland shootings affected the people of Parkland. I'd reconsider that statement if I were you.
Regarding perspective, nobody says we should not work on larger problems. It's not an "either-or" issue.
Regarding what laws to enact, I really like the system put in place by Canada.
https://en.wikipedia.org/wiki/Gun_laws_in_Canada
It's comprehensive, takes a systems level approach and ensures anybody with a good reason to own guns can have them if they meet reasonable proficiency standards and can pass a reasonable background check. There is a lot of detail in the wikipedia page.