Thank you for your wish
To answer your questions-
1)- This same thing already happened to me one of my very famous gig (business card design) gig i did updated the same way you said and then completely i lost orders even can’t find my gig and then i contact our CS to ask about this they said nothing about this i’m really sorry about this my gig were still DOWN i think fiverr has some tech SEO issues. try to re update your gigs again ? try new taglines and try new SEO title and add some keywords to your description that might help you.
2)- Yes that was a great great idea! do that don’t think twice Social media is the best way to earn clients! go ahead with that right now. just do that and try to share your facebook page on everywhere. and same as for the fiverr page.
3)- there is few main issues i’ve found on your gigs check below
on the gig called “I will do any Photoshop Work for you” it has really un-scale gig preview make it fit properly ! re-adjust it to fit on the real size of gig preview (you can see it on gig editing page) also few other gigs has the same issue please update them nicely also remove that Level 1 Badge it doesn’t mean anything
lastly your designs are perfect you have great knowledge about graphics go ahead an continue the work that might improve your creativity. make sure to watch youtube tutorials of new things new tools new plugs and remember always try to offer new things in different ways! like deals / packages!
Wish you best i hope this helps!