The first Positive Reinforcement idea is a redesign of the impact module: incorporating stats, graphs, and other contribution information. This idea received the widest support, and we plan to start our work based on the design illustrated on the side.
"Add a link" available at more wikis ― Add a link feature has been deployed to more wikis: Catalan Wikipedia, Hebrew Wikipedia, Hindi Wikipedia, Korean Wikipedia, Norwegian Bokmål Wikipedia, Portuguese Wikipedia, Simple English Wikipedia, Swedish Wikipedia, Ukrainian Wikipedia, Abkhazian Wikipedia, Achinese Wikipedia, Adyghe Wikipedia, Afrikaans Wikipedia, Akan Wikipedia, Alemannisch Wikipedia, Amharic Wikipedia, Aragonese Wikipedia, Old English Wikipedia, Syriac Wikipedia, Egyptian Arabic Wikipedia, Asturian Wikipedia, Atikamekw Wikipedia, Avaric Wikipedia, Aymara Wikipedia, Azerbaijani Wikipedia, South Azerbaijani Wikipedia. This is part of the progressive deployment of this tool to more Wikipedias. The communities can configure locally how this feature works.
Selecting topics ― We have created an "AND" filter to the list of topics at Special:Homepage. This way, newcomers can decide to select very specific topics ("Transportation" AND "Asia") or to have a broader selection ("Transportation" OR "Asia"). At the moment this feature is tested at pilot wikis.
Algorithm improvements ― The algorithm now avoids recommending links in sections that usually don't have links and for first names. Also, it now limits each article to only having three link suggestions by default (limited to the highest accuracy suggestions of all the available ones in the article).
User experience improvements ― We added a confirmation dialog when a user exits out of suggestion mode prior to making changes. We also improved post-edit dialog experience and allow newcomers to browse through task suggestions from the post-edit dialog.
Community configuration ― We allow communities to set a maximum number of links per article via Special:EditGrowthConfig.
Future change for Add a link feature ― We will suggest underlinked articles in priority. 
Patrolling suggested edits ― Some users at Arabic Wikipedia, Spanish Wikipedia, and Russian Wikipedia told us that "Add a link" and "Add an image" edits can be challenging to patrol. We are now brainstorming improvements to help address this challenge. We have already some ideas and we started some work to address this challenge. If you have any thoughts to add about the challenges of reviewing these tasks or how we should improve these tasks further, please let us know, in any language.