You probably mean feature boxes, infoboxes/side-bar are not mentioned on Template guidelines.
1.) Do you mean like one box for all events (Wikipedia example in upper right-hand corner https://en.wikipedia.org/wiki/Pablo_Picasso), or 10 separate boxes one for each event (Like http://www.wikitree.com/wiki/Stewart-6849)?
Wikipedia's infobox is one solution for this, but my idea was to create the timeline in paragraphs
== Timeline ==
{{Event|...}}
{{Event|...}}
{{Event|...}}
...
or in table like RJ suggested in table.
{|
!Timeline
{{Event|...}}
{{Event|...}}
{{Event|...}}
...
|}
Timeline would be nice addition to the profile and data could be easily extracted for further processing.
2.) Ellen's (you mean Anna's) could coexists with template. We could prepare a few variations of output:
- hidden: no output
- minimal: Baptism: St. Mary's, New York, New York, 1 Sept 2016.
- timeline: 1 Sept 2016: Baptism: St. Mary's, New York, New York
- Table:
| -
| 1 Sept 2016 | | Baptism | | St. Mary's, New York, New York | | Source
- Sentance: Aleš was baptised on 1 Sept 2016 in St. Mary's, New York, New York <ref>Source</ref>.
- ...
So if someone really likes formatting of the profile, data can be added hidden from the user, or in various forms.
Idea for gedcoms is good, but let's leave that for later when this concept is excepted and implemented and used. Usually people don't edit GEDCOMS after import. They just leave it as it is for a long time. 4,5 million profiles have .ged in it and 3.6 milions have GEDCOM in text. If one really edits the profile, GEDCOM or .ged should not be in it. I remember when I made first import, I didn't know what to do with created text and data (import IDs). Now I know, I could delete almost everything.