Almost week ago, I posted a comment on Steam about Polynesia Split mod, but since I haven't got any answer on that matter I'll thought that I try to post it here
First things first: I'm really enjoying yours mod, it has high quality art (well, it's janboruta afterall), interesting and historically accurate abilities, nice DoM voiceovers (well, it's Andrew Holt afterall) etc. but I've encountered some problems with it.
1. Decisions for Tonga doesn't display properly. Of course, you can take relevant information from E&D wiki, but still, it doesn't look very, well, professional

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2. Isn't Tonga UA a little too strong? Well, maybe I'm still noob in this game (I start with Civ 5 some 4-5 months ago), but I think that such high rewards - getting through social policies and early technologies in no time, securing pantheon and even religion without any effort - just for exploring (which civ intended for CS alliances will be doing anyway) is pretty imbalanced.
Wouldn't be better if Tonga just get double (or even triple) gold and faith bonuses for meeting City States (plus analogical bonus for meeting regular civilizations). Something like peaceful Songhai's ability. That would give Tonga even stronger diplomatic bias, and you could use that gold to buy religious, cultural and scientific buildings (hence sort of taking back "old" bonuses).
3. This one isn't report about any bugs but rather question about strategy for Tonga. I don't really get synergy between Tonga's uniques and decisions. UA pushes for diplomatic victory and City States alliances but those Tonga's two mutually exclusive decisions deterring you from trading with them (hence making harder to use Treaty Organisation tenet); UB gives incentive to build tall and go for scientific, Vava'u decision can only be useful if you warmongering etc.
Any tips, strategy, tactics?

Little warmongering, wiping out other diplomatic nation, using former Tongiakis for Autocratic Gunboat diplomacy tenet - that sort of thing?
4. Rapa Nui's maoi doesn't seems to work as intended. I'm getting only "vanilla" culture but no faith. This is the most disappointing bug, because that civ bascially scream Sacred Sites Cultural Victory for me

Any chance for soon fix?
5. Last but not least - when we can expect to play as Sparta and Athens?

Any chance for little spoilers about art and uniques of splintered Greece ?
Thanks for the answer, and once again - good job
And finally, I want to say hello to all of you, and thank you for many great mods (Historical Religions, Cultural Diversity, Ethnic Units, Events and Decisions come to mind) which makes my experience with Civilization much more immersive
P.S. Sorry for any grammar and spelling mistakes, I'm not native speaker and haven't need to use english language much often.