This could read 'no more limited editions' but I don't know if I can make that call.
In my personal opinion, the only skin that made sense in a time-limited fashion was the Cobra wireframe skin for the 30 years anniversary. Anything beyond that looked completely arbitrary to me.
- The flags. Maybe you don't want to see lots of ships with country flags painted on the hull and therefore limit their numbers by limiting the time window to buy them - but in that case why introduce them in the first place if you don't like the idea that much?
- Viper Chrome. I mean I got the skin and use it all the time, not because it was time-limited, but because I always like bare metal and chrome. Why was that one time-limited, and why is the gold one not? And is the Cobra Chrome time-limited as well? Let's assume the best case, Viper Gold and Cobra Chrome are there to stay (yay), and probably (hopefully) all other ships get that treatment, too (Where is my Eagle Chrome and Python Chrome? - *insert popular Futurama meme*). Then there will be this weird, illogical hole in the store where eventually, for every ship a chrome paintjob is sold, except for the Viper because... someone some time ago decided it would be a clever idea to make more short term sales happen in favour of reaping the long term benefit.
- Did I miss any other time-limited skins?
My personal wish, and again I speak that not out of selfish desire because I got the Viper Chrome when it was available, is that it returns to the shop, permanently, too, and from now on no more time-limited skins. Simple as that. Time-limited discounts, or free give-aways (like the Cobra pack - that was very very nice) are fine, of course. But removing skins from the online store is basically just a method to create artificial scarcity that is unnecessary from every single angle you look at it, except the one that tries to drive a few more people to buy it because otherwise they fear to regret not having it when it will be too late. Which imho is a shady marketing tactic and does not paint any company doing so in a good light*.
(*It was the main reason I never went back to The Secret World after taking an extended break. Their tactic of constantly removing stuff from the store and putting in new things in order to always keep people on their toes, "buy now or never again", felt very off-putting and like a barrier, a wall on which is written "behold all the things you missed by not being there at the right time".)
Ultimately, I want as large and varied as possible a selection of skins and decals for all ships, and then it should only be a matter of which ones each players likes what they fly with (and whether they want to part with a few bucks for that), not whether they joined the game before some time-limited item was deleted from the store.
Another issue I have with time-limited anything is that it's become the plague in gaming over the course of the recent years. Some games lock parts of their content behind "preorder only" walls. I mean not just the odd exclusive skin (which I'd still prefer were not part of such package), but actual game content to play through. Once upon a time (before I deserted that genre for good) I had a peorder edition of an RTS that came with a preorder exclusive map. Like, try playing that one in multiplayer, facepalm.
These days it has become so bad that for some games you'd have to buy multiple copies from different retailers and online stores because they put different preorder content into packages that are exclusive to each shop. And then the marketing double-speak surrounding such shenanigans sounds like they actually believe they were doing their customers a "service" with these "offers", which I would rather call insults.
Also, for the record, I find artificial scarcity absolutely atrocious from a conceptual standpoint. Like, in the digital world we don't have these problems where there is only so much of all the materials in the ground, real estate on the continents etc. We can conjure up anything we wish to, in any quantity we desire, and we should utilize this power and not cripple it by thinking "well it happens in physical shops with physical items, too". Because there it happens because, well, no one can produce an infinite number of a specific piece of, say, clothing.
I want to close with an opinion I know I am in a tiny minority, but I don't take pleasure from the fact that what I have, you can't have. To the contrary. When I am flying around in my chrome Viper and someone would see me and say "ah man I love this, gotta buy it, too" and I have to tell them it was a time-limited thing, my heart breaks.