Also, I have been wondering if it is possible to have the same character on both Outerworld and Expansion teams at the same time.
This should be possible.
I have realised why I have such an issue with getting the characters I want. When I started playing I only had a few unlocked characters, now I have 231. Makes sense that my favourite 2% aren't on offer all the time.
Yeah, the idea I'm trying to promote is working with what you have and testing its potential. Otherwise, it won't matter how many characters are in the game if only the top 4 are picked.
However, I do think the ability to have increased summoning chances for your top picks overall would be a potentially good idea. Could push this even further and have a set of characters that have evolution states (visually and ability wise) and specific storylines to reach "Champion Status". If so, I'd like to start off with a small pool of characters that can do this (Sort of like the starter pokemon you can choose from at the beginning of the game). If that works, then I'd work on adding more overtime.
And the Elemental Auras page seems a bit sparse. Any plans on secondary auras or auras for when you have four members of the same element, or even two? Even an elemental aura skill tree so that the player can build a stronger aura for each element, choosing to focus on one element or improving them all equally. You could introduce a new currency for this, either one-currency-fits-all or one-currency-per-element.
Indeed, it is. I've been approaching development with a horizontal priority. By this I mean that, as soon as I set up a system, such as auras, I move on to set up other systems. Eventually I'll go back and then scale vertically (for example, add 30 more auras).
The last thing I wonder is why on earth it costs so much to increase the number of spots to open eggs. It is the least needed thing as we all have plenty of spare pets. Especially considering that by the time anyone is willing to spend 50K creds on an extra spot, players will probably have 20 of each pet spare. Even 5K is too much. Personally I wouldn't even spend 500 on a spare place. Well, maybe if I was in a completionism mood I would.
"It is the least needed thing". This is where we must figure out what should cost a lot and what shouldn't. For example, having soul slots cost too much, too early, can be too discouraging for newer players. However, as you already mentioned, these lower priority upgrades have more room for higher costs. This also provides something to work towards over time (longer-term goals).
Longer term there might be companion evolutions where you need to combine grade 1 companions to get to grade 2, and grade 2’s to get to grade 3, at that point, having more slots would be important.