Learn more about this change here.
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Just because I feel like the info given wasn't enough, and that I really REALLY, want aternos to have a 1.7.10 modpack, I want to help give some information.
The modpack being suggested is called Infinity and is "Feed-The-Beast" (FTB) version of a 1.7.10 kitchen sink pack. The modpack doesn't really server a specific goal, such as Crash Landing, but is more like a successor to the fantastic FTB Monster modpack.
Here is a web page which has all the mods listed in the pack, ( https://feedthebeast.atlassian…/display/PML/Infinity+1.7 ) and for a quick run down, here are a few of the ones listed.
Applied Energistics 2 - A remake of the old AE mod, it's a fan favorite for those of us who have a ridiculous amount of items that require a centralized "dump chest".
Big Reactors - A current method of generating massive amounts of RF, similar to the IC2 reactor, which is also in this, except they don't explode... yet. 
Funky Locomotion - Remember frames back from Red Power 2? Yeah. Enough said.
Mystcraft - Ever get tired of not having molten pools of gold? No? Oh... well, you can do that... if you wanted. 
Thaumcraft - Ever wanted to do complicated, INFURIATING magic? So do I! Warning: This mod has cause many a hair tearing.
...And many more!
(Plus Fastcraft is included in the modpack, and is even allowed to be enabled for modpacks, but is disabled in the beginning.)
What more could you want? Let's get it today!
*Rides off into the sunset, waiting to see a new modpack*
(Here's some additional info, if you want. It's the thread that intoduces the modpack. http://forum.feed-the-beast.co…b-infinity-release.62535/ Hope this all helps.)
Thank you for the detailed description, we will check it out as soon as we can.
FTB Infinity has been added a while ago, but we removed it again, because it didn't work well on our hosts.
